The article walks through the full payment chain in China—from an e‑commerce checkout on JD.com, through third‑party payment gateways, banking channels, and the central bank—detailing each subsystem such as cashier, transaction core, payment core, member, accounting and settlement layers.
E‑commerce platforms are now offering prices that are lower than the purchase cost of distributors, eroding trust, compressing margins and forcing a painful dilemma for FMCG distributors who must choose between losing customers by not cutting prices or sacrificing profit by cutting them.
The Junpin Hui app, launched by Xijiu in 2023 and shut down in 2026, exemplifies a digital‑transformation flop caused by strategic misalignment, runaway pricing, fragmented channel integration, and a lack of traffic, offering hard‑won lessons for the Chinese white‑liquor industry.
The 2026 China E‑commerce AI whitepaper, based on surveys of more than 900 merchants, reveals that AI has moved from isolated tools to integrated workflow agents, boosting product design, market testing, decision‑making and operational efficiency, and outlines a four‑level AI integration framework for future growth.
The article details how 1688 transformed its platform from a traditional intent‑matching traffic hub into an Agentic AI system that understands business tasks, outlining a three‑step implementation of knowledge, trajectory and environment redesign, dual‑track evolution, novel evaluation methods, and the emerging role of product managers as evaluation engineers.
The 2026 618 promotion saw a 40% sales rise on JD, a doubling of 133 brands on Tmall and a 70‑fold surge on Meituan, while industry inventory exceeded 3000 billion CNY and turnover days hit 900, highlighting a shift from price subsidies to a multi‑dimensional value‑focused strategy across online channels.
This article provides ready‑to‑copy AI prompt templates for four common visual scenarios—social‑media cover images, e‑commerce product main images, marketing posters, and logos—detailing dimensions, style guidelines, and specific element descriptions so you can generate appropriate graphics instantly.
The article examines iMoutai’s four‑year digital transformation—from solving trust issues with transparent online purchase to building a consumer‑focused ecosystem that leverages flash events, a low‑barrier social app, diversified product lines and a traffic‑hub channel model, now serving 93 million users and generating 215 billion RMB in a single quarter.
Instant retail is shifting from a race for minute‑level delivery speed to a scenario‑driven demand model where algorithms anticipate consumer needs, turning platforms into lifestyle companions and forcing brands to adopt digital scene‑building, cross‑category supply chains, and content‑centric strategies to stay relevant.
OneSearch‑V2 introduces a latent‑reasoning enhanced self‑distillation framework that augments query understanding with thought‑augmented CoT, aligns preferences via direct user behavior feedback, and achieves up to 4 % CTR lift and significant order growth without adding inference cost or latency.
OneSearch‑V2 introduces a zero‑cost generative search upgrade that leverages latent‑reasoning‑enhanced self‑distillation, thought‑augmented query understanding, and behavior‑feedback preference alignment, delivering offline HitRate gains of up to 2.68 % and online CTR, buyer and order increases of roughly 4 %, 2 % and 2 % respectively.
The article analyzes how to design a high‑availability architecture for large‑scale e‑commerce systems, detailing layered risk isolation, stateful storage strategies for flow and state data, unified document‑ID routing, multi‑replica databases, multi‑datacenter synchronization, and real‑world JD case studies that demonstrate elastic scaling and disaster recovery.
The article outlines why e‑commerce systems fail, presents a four‑layer high‑availability defense—including load balancing, service isolation, data protection, and fallback mechanisms—plus concrete monitoring, alerting, and emergency response practices illustrated with real‑world scenarios and code samples.
This article details how Alibaba 1688 tackles the “information cocoon” problem by deploying large‑model inference‑based recommendation, describing its three‑layer architecture, multi‑stage user demand analysis, long‑cycle behavior compression, prompt engineering, trend mining, near‑line serving, and future enhancements.
The article analyses how Taobao's AI try‑on solves the online clothing "fit" problem by requiring a user photo for realistic rendering, applying click‑to‑try and browse‑and‑try flows, designing a private wardrobe, and leveraging the peak‑end rule to build trust rather than merely cut returns.
OpenAI's GPT‑4 Image 2 shifts from a mere visual inspiration tool to a production‑ready system that can handle text, layout, multi‑size adaptation and variant generation, threatening repetitive design tasks across branding, UI, e‑commerce and game concepts while leaving high‑level creative strategy untouched.
The article analyzes recent rumors that Baidu's e‑commerce division is mandating front‑end and back‑end developers to pair up and become full‑stack engineers within months, arguing that the move is a cost‑cutting strategy that reshapes job requirements, accelerates layoffs, and reflects broader pressures on tech talent in China.
This article analyzes JD's self‑developed database kernel DongSQL, describing its architecture, the challenges of overload, flash‑sale write spikes, cache consistency, execution‑plan drift, and thread congestion, and explains how hint‑based limiting, RETURNING syntax, statement outlines, and a built‑in thread pool address each issue.
This article analyzes the challenges of traditional product selection on Taobao and presents an LLM‑driven solution that combines multi‑round online search, DeepSearch vs. WideSearch strategies, sample construction, SFT and RL training, and shows experimental results that improve relevance, diversity, and efficiency of the selected product set.
This article details the AI-driven testing platform built for Taobao’s marketing venues, describing how large‑language models and multimodal agents enable visual rendering verification, price and content consistency checks, and automated multi‑device adaptation, resulting in a 40% overall efficiency boost and a 100% increase in tester productivity.
This guide shows how fast‑fashion e‑commerce teams can use Amazon Bedrock AgentCore MCP Server to accelerate the development, configuration, testing, and deployment of a reliable, extensible AI customer‑service agent, cutting setup time from hours of documentation reading to minutes of instant code generation.
The article explains how a natural‑language‑driven AI platform, with pre‑configured agents and parameterized calls, can replace a complex 150‑line SKU‑combination risk‑checking algorithm in e‑commerce, dramatically improving readability, maintainability, development speed, and business value while reducing cost and response time.
Meta is secretly testing an AI shopping assistant that leverages billions of users' social profiles, shifting recommendation logic from reactive behavior data to proactive identity‑driven suggestions, while raising significant privacy and ecosystem implications for e‑commerce.
This guide walks through installing Nginx UI via Docker, configuring its dashboard, setting up static and dynamic proxy rules, and deploying a SpringBoot 3 + Vue e‑commerce project (mall) with both admin and front‑end services, demonstrating server monitoring, SSL management, and user authentication features.
This article walks through designing and implementing a complete JMeter load‑testing solution for an e‑commerce platform's big‑sale scenario, covering business‑flow mapping, request correlation, multi‑stage stress testing, real‑time monitoring with InfluxDB + Grafana, bottleneck identification, and practical optimization tips.
OxygenREC presents a fast‑slow thinking, instruction‑following generative framework that overcomes latency, reasoning, and multi‑scene scalability challenges in e‑commerce recommendation, delivering unified training, low‑latency inference, and significant business impact across JD.com scenarios.
This comprehensive guide explores the evolution of payment checkout systems, breaks down their architecture, outlines preparation steps, details processing flows, analyzes common payment scenarios, and presents five concrete industry examples—from medical billing to ETC recharge—illustrated with diagrams and key performance metrics.
This article outlines JD Global Sales' multilingual testing challenges, the three‑layer interface‑page‑user‑flow testing architecture, automation and AI‑driven strategies that delivered over 100× UI efficiency and 70%+ API gains while paving the way for continuous globalized quality assurance.
The article chronicles how Liu Shiqi built a cross‑border B2B slipper business from scratch, leveraged Midjourney, DALL‑E, GPT‑4 and Zapier to automate design, marketing and sales, and achieved a five‑fold increase in per‑person revenue, 92% gross margin, and data‑driven decision making.
This guide explains how to add purchase quantity limits to a PHP‑based online store by designing a stock field in the database, updating product detail, cart, and order pages, using Ajax for dynamic updates, and ensuring inventory consistency throughout the checkout process.
This article details a systematic set of optimizations—dual‑layer pre‑fetch, multi‑level caching, multi‑instance tab management, and white‑screen mitigation—that transformed an e‑commerce order list from sluggish and unstable to fast, smooth, and reliable for billions of users.
OneSug introduces an end‑to‑end generative framework that unifies recall, coarse‑ranking, and fine‑ranking for e‑commerce query suggestion, addressing the limitations of traditional multi‑stage cascades and dramatically improving relevance, efficiency, and business metrics in real‑world deployments.
This guide walks you through designing and implementing a comprehensive e‑commerce monitoring solution that covers server resources, application performance, and business metrics using Prometheus for data collection and Grafana for visualization, including panel design, alerting, and stress‑test practices.
The article outlines how JD’s new AI shopping app and Qianwen’s integration into Alibaba’s ecosystem exemplify a sweeping AI application surge that is reshaping e‑commerce, logistics, power, manufacturing, autonomous driving and other sectors, heralding a new commercial ecosystem era.
The article examines JD’s AI‑powered shopping app, detailing its chatbot‑style interface, intent‑driven workflow, AI‑enhanced product recommendation, multi‑scenario integration such as travel and dining, and the underlying research on Fast‑Slow thinking and the SA‑GCPO algorithm that powers the experience.
This article explains how e‑commerce flash‑sale systems handle extreme concurrency by defining TPS requirements for different scales, applying a layered filtering architecture, and using techniques like CDN caching, rate limiting, Redis pre‑deduction, and minimal database writes to ensure stability.
This article details Baidu’s AI‑driven redesign of its merchant backend, introducing three unified interaction paradigms—embedded, accompanying, and managed—that streamline complex tasks, improve visual consistency, and deliver measurable gains in processing speed, success rates, and user satisfaction.
This article breaks down performance testing into three essential dimensions—time behavior, resource utilization, and capacity—explains their key metrics, demonstrates a detailed e‑commerce flash‑sale case study, and shows how systematic testing and optimization can dramatically improve response times, throughput, and scalability.
The article explains functional testing by defining its three core dimensions—correctness, completeness, and suitability—illustrates each with concrete test methods, and demonstrates their application through a detailed e‑commerce coupon feature case study.
The article explains functional testing by defining its three core dimensions—correctness, completeness, and suitability—detailing their definitions, test focuses, methods, and a concrete e‑commerce coupon case that illustrates how to design, execute, and analyze tests across these dimensions.
The paper introduces a semi‑supervised, extensible unified framework (SSUF) that integrates knowledge, label, and structural enhancements to overcome data sparsity, label bias, and fragmented sub‑tasks in e‑commerce query intent prediction, achieving superior offline and online performance.
Traditional recommendation systems lag behind fast‑moving external trends, missing the freshness and surprise users crave. This article details an end‑to‑end AI pipeline that perceives, understands, and reacts to hotspots within hours, automatically generating high‑quality product selections and continuously optimizing through feedback loops.
The 2025 Global E‑Commerce Report reveals a mature market with stable overall traffic, a sharp shift toward mobile apps and generative AI, divergent performance across product categories, and strategic recommendations for brands to focus on high‑quality growth, AI‑driven visibility, and superior app experiences.
The article provides an in‑depth technical analysis of DongSQL V1.1.0, detailing its syntax extensions, concurrency control mechanisms, query‑execution optimizations, thread‑pool redesign, and extensive benchmark results that demonstrate significant performance gains for e‑commerce workloads.
This article examines the challenges of implementing payment functionality in business systems, breaking down the process into detailed steps, outlining sequence diagrams, proposing a data structure design, and discussing related e‑commerce components such as product and coupon management to ensure reliable, scalable transactions.
The article details the development and deployment of LORE, a large generative model that reshapes e‑commerce search relevance by combining knowledge injection, chain‑of‑thought reasoning, and multimodal alignment, achieving simultaneous improvements in user experience and revenue metrics.
This guide details a modular e‑commerce QA framework that organizes configuration, HTTP clients, test data, fixtures, and test cases, integrates multi‑process execution with CI/CD pipelines, and defines quality gates to ensure reliable, maintainable automated testing for large‑scale services.
An e‑commerce order system acts as the core connector linking users, merchants, payments, logistics and revenue, and this article dissects its three essential flows—forward, reverse and state transitions—while detailing the technical challenges and solutions for order creation, payment, fulfillment, cancellation, after‑sale, architecture, and data handling.
This article explores Kuashou's e‑commerce data metric system, detailing why a metric framework is essential, the business context, the challenges faced across data production, querying and usage, and the practical solutions implemented to improve decision‑making and operational efficiency.
This article details Baidu’s e‑commerce risk‑control overhaul, describing how a multimodal large‑model, rule engine, and knowledge‑base collaboration replaces traditional manual and rule‑based reviews, achieving full‑machine coverage, instant feedback, higher accuracy, and improved merchant and user experience.
This article details the end‑to‑end technical redesign of an e‑commerce management‑category system, covering business pain points, a layered backend architecture, core Java modules, data‑model design, data‑warehouse computation, automated rule validation, approval workflows, and the resulting efficiency gains that shrink rule‑update cycles to just one or two days.
In a round‑table hosted by Baidu Intelligent Cloud, industry leaders dissect how AI agents are transforming Chinese retail and overseas brand expansion, addressing challenges such as rising traffic costs, low repurchase rates, localization hurdles, and demonstrating concrete use cases in content generation, intelligent customer service, and automated marketing that promise to make AI agents an essential, not optional, component of modern commerce.
This article dissects the core processes, functional challenges, and architectural design of a high‑throughput, strongly consistent e‑commerce order system, covering forward and reverse flows, order creation, payment, fulfillment, cancellation, after‑sale handling, and the layered backend architecture that powers it.
This article explains how large‑model AIGC technology reshapes e‑commerce by enabling mass‑produced, user‑profile‑driven visual assets, detailing the evolution from early online trade to the 2.0 era, the technical pipeline of multimodal models, and the practical impact on merchants.
This article explains why Kuaishou e‑commerce needed a metric system, outlines its business context, describes the challenges faced by data product managers, engineers, and operators, and shares the practical steps and management practices used to construct and maintain the system.
This article explains how a leading e‑commerce platform leveraged large language models to overcome traditional search relevance challenges, detailing the iterative workflow, model distillation, performance gains, deployment results, and future directions for smarter, more accurate product search.
The article examines Kuaishou’s e‑commerce data metric system, detailing why a metric framework is essential, how it was built, the product practice, management methods, and the challenges faced by data product managers, engineers, and operators across production, querying, and usage stages.
This article explores Kuaishou e‑commerce's journey in constructing a comprehensive data metric system, detailing its business context, the necessity of metrics, challenges faced by data product managers and engineers, practical implementation steps, management practices, and a concluding Q&A.
This article details Baidu's e‑commerce risk‑control overhaul, explaining how traditional rule‑based and manual reviews struggled with multimodal violations, ambiguous semantics, and poor merchant experience, and how a new AI‑driven pipeline combining large multimodal models, rule engines, and knowledge‑base queries achieved full‑automation, real‑time feedback, and high explainability.
This article examines Kuaishou's e‑commerce data metric system, explaining why such a framework is essential, how it was constructed, the practical product implementation, management practices, and lessons learned, while also addressing common data production, query, and usage challenges faced by product and engineering teams.
Learn step-by-step how to design a MySQL categories table, retrieve data with PHP, construct a recursive tree based on parent_id, and render the hierarchical structure as an HTML list, providing a complete solution for managing nested product categories in e‑commerce applications.
This article examines how AI‑generated content (AIGC) is reshaping e‑commerce video creation by addressing the limitations of rule‑based pipelines, introducing a MultiAgent collaborative system, enriching material sources, leveraging large‑model editing, and outlining future directions for fully generative video production.
ZhaiZhai announced the phased shutdown of its ten‑year‑old C2C "free market" and is shifting to a C2B2C model that relies on platform‑verified second‑hand goods, a move that reshapes user experience, trust mechanisms, and operational costs.
Sylius 2.1.6, the open‑source PHP e‑commerce framework built on Symfony, introduces a series of refactors, bug fixes, CI improvements, and deprecations that enhance product management, shipping, payment integration, and overall platform stability.
This guide explains how to add Alipay sandbox payment support to the open‑source mall project built with SpringBoot 3 and Vue, covering the required code changes, three‑step payment flow, and the minimal configuration needed to enable secure online transactions.
The article recounts how a risk‑control algorithm engineer progressively refined a generic large language model through four stages of prompt engineering—role‑playing, business knowledge injection, deeper analysis, and a double‑hypothesis decision framework—to transform it into a precise e‑commerce fraud detection expert.
This article explains how a multi‑agent AI system shifts asset‑loss control from reactive to proactive by building a full‑link protection framework that extracts knowledge, identifies risks, automatically deploys safeguards, and continuously learns from incidents, delivering faster, more accurate financial security for e‑commerce platforms.
This article explains how JD Health’s recommendation team integrates large‑model technologies—scaling CTR models, enhancing pipelines with LLMs, and adopting generative models—into e‑commerce recommendation systems, highlighting practical applications and technical challenges specific to the health‑commerce sector.
The article explains how Taobao embeds a user‑specific “gene” in the last six digits of its order numbers, enabling efficient sharding routing, uniform data distribution, and idempotent order handling while maintaining global uniqueness in a large e‑commerce system.
Lazada transformed its e‑commerce product selection by building a unified, real‑time platform on Alibaba Cloud Flink and Hologres, overcoming data silos, freshness delays, and high‑throughput challenges to enable millisecond‑level decisions across six Southeast Asian markets.
This article analyzes a JD e‑commerce dataset using Python and MySQL to calculate key metrics such as PV, UV, conversion rates, attrition, daily activity, hourly trends, user‑behavior funnels, purchase intervals, retention rates, product sales, and RFM segmentation, and then offers data‑driven recommendations to improve traffic, conversion, and user loyalty.
Learn how to design and implement automatic order expiration in e‑commerce systems using three approaches—simple scheduled table scans, delayed message queues, and a Redis time‑wheel—detailing their trade‑offs, code examples, indexing tips, distributed locking, and failure‑handling strategies.
This article explains the hierarchical relationship between APM, distributed tracing, and observability, walks through a real Double‑11 e‑commerce incident, and demonstrates how a well‑designed observability stack can pinpoint the root cause, apply emergency fixes, and restore system performance within minutes.
This article analyzes the three major challenges of e‑commerce marketing venue configuration—multi‑goal coupling, verification lag, and cross‑team inefficiency—and presents a full‑link "pain‑point traversal" solution that simulates future time, user groups, and AB experiments to enable pre‑launch validation, dramatically improving efficiency and risk control.
This article walks through the complete process of creating a WeChat mini‑program that uses large‑language‑model chat to recommend personalized fragrances, covering idea generation, tool selection, prompt design, AI‑assisted debugging, UI/UX refinement, mini‑store integration, and final publishing steps.
JD Retail’s “JingDianDian” AI virtual try‑on platform leverages a 12‑billion‑parameter Flux‑Fill diffusion model and multimodal pose estimation to automatically create realistic model images and videos, integrates with the JingMai A/B testing system, and delivers up to an 80% boost in conversion while cutting production costs and time dramatically.
In this detailed case study I describe how I discovered the CRMEB Java e‑commerce project on GitHub, cloned and evaluated its features, customized product, order, and payment modules for a mother‑and‑baby shop, tackled environment setup, performance tuning, and deployment, and ultimately delivered a fully functional marketplace that boosted my freelance income fivefold.
JD's retail technology team presents five SIGIR 2025 papers that introduce advanced graph neural, causal optimal transport, domain‑oriented relevance, multi‑objective bid‑word generation, and hierarchical user behavior models to dramatically improve precise matching in e‑commerce search, recommendation, and advertising.
This presentation explores the evolution of AI agents in e‑commerce content creation, detailing the transition from text‑only industrial production (1.0) to multimodal image and video generation (2.0) and finally to quality‑driven optimization and decision‑making (3.0), highlighting technical architectures, challenges, and future directions.
JD’s algorithm engineer recounts how his team transformed e‑commerce search by developing the PODM‑MI re‑ranking framework, uncovering a novel “hourglass” bottleneck in generative retrieval, and implementing lightweight solutions that boosted diversity, relevance, and order volume, culminating in a SIGIR publication.
JD’s algorithm engineer describes how a three‑layer PODM‑MI re‑ranking framework, combining Gaussian preference modeling, mutual‑information optimization, and utility‑matrix fusion, overcame the hourglass bottleneck in generative retrieval, dramatically improving search diversity, user experience, and generating over ten million additional orders.
Payment systems serve as the essential bridge linking consumers, merchants, and financial institutions in e‑commerce, handling everything from transaction processing and security compliance to multi‑channel payment management, order settlement, refunds, and detailed architecture design that evolves from closed internal apps to open, scalable micro‑service platforms.
This guide explains how to design the database, modify product detail, cart, and order pages, and use Ajax in PHP to enforce purchase quantity limits, ensuring stock accuracy and improving user experience in an online store.
Implementing a logistics tracking system in a PHP‑based online store involves collecting shipment data, integrating a tracking API, parsing responses, storing results in a database, displaying updates to customers, and regularly refreshing the information to enhance user trust and satisfaction.
This article explains why asset‑loss (资损) prevention is critical for high‑value e‑commerce finance, outlines a step‑by‑step methodology covering pre‑, in‑ and post‑incident stages, rule discovery, measurement, implementation options, and operational best practices, and shares concrete results and visual diagrams.
This article explains the concept, architecture, core modules, decision process, and practical strategies of intelligent order routing in e‑commerce, showing how real‑time data and rule‑based optimization can reduce costs, shorten delivery times, balance inventory, and enhance customer experience.
At GAITC2025, JD Retail’s AI Infra lead Zhang Ke detailed the challenges of e‑commerce AI inference and introduced the xLLM edge‑cloud unified large‑model architecture, highlighting adaptive scheduling, offline unified scheduling, multi‑layer pipelines, and agent collaboration that boost performance, cut costs, and pave the way for future AI advancements.
The article details JD Retail’s collaboration with Tsinghua University to build the xLLM edge‑cloud unified large‑model inference framework, addressing e‑commerce AI challenges such as diverse inputs, task scheduling, model compression, and cost, while outlining future research directions and performance gains.
Retail giants like Walmart, Amazon and Shopify are exploring or launching stablecoin solutions, with Shopify enabling USDC payments via Coinbase’s Base network, allowing merchants in 34 countries to receive local currency instantly, reduce fees, and earn 1% cash‑back, signaling a shift toward blockchain‑based commerce.
This article showcases three JD tech case studies—using large language models for e‑commerce query expansion, applying sparse large models with scaling‑law experiments to improve ad prediction, and building proactive risk‑prevention systems—to illustrate practical AI engineering that drives higher recall, conversion, and system robustness.
This article breaks down a mature e‑commerce platform into six layered modules—user reach, business operation, transaction fulfillment, supply chain, infrastructure, and BI—detailing core functions, design considerations, and data‑driven processes to guide scalable system design.
This comprehensive guide walks product managers through meticulous pre‑interview research, data‑driven storytelling, strategic in‑interview communication, and effective post‑interview follow‑up, offering actionable frameworks and real‑world examples to dramatically increase the chances of securing a product management role in top e‑commerce companies.
A comprehensive glossary for e‑commerce product managers that defines key metrics such as GMV, SKU, UV, CVR, AOV, CPC, and models like RFM and AARRR, while highlighting common pitfalls and practical strategies for data‑driven decision making.
This article analyzes the challenges of e‑commerce flash‑sale spikes and presents four proven architectural patterns—pressure distribution, Redis + MQ, Inventory Hint, and their combined use—detailing their principles, Lua scripts, transaction messaging, and practical trade‑offs for building resilient, high‑throughput systems.
The article introduces JianYi, a self‑developed image segmentation and matting system for Taobao's home‑decoration business that supports product, human, and panoramic segmentation with multi‑modal interaction, achieving high‑precision real‑time performance and powering AI tools such as "Jiazuo" and "Fang Wo Jia".
This article explains how to prevent duplicate order submissions during high‑traffic e‑commerce events by using a server‑generated anti‑duplicate token stored in Redis, detailing the token acquisition, validation flow, and handling of repeated requests to ensure inventory integrity and accurate financial reconciliation.
This tutorial explains how to build logistics tracking and delivery management features for an e‑commerce platform using PHP, covering database table creation, inserting, updating, and querying of tracking and delivery records with complete code examples.
This article provides a step‑by‑step PHP tutorial for building logistics tracking and delivery management features in an e‑commerce system, covering database schema design, code for inserting, updating, and querying tracking and delivery records, and explaining how these functions improve operational efficiency.
OpenAI has rolled out a shopping‑focused upgrade to ChatGPT in GPT‑4o, letting users search for products, view curated cards with images, prices and reviews, and click direct purchase links, while claiming no commission and sparking debate over the future of AI‑driven e‑commerce.
The notes synthesize two books on Taobao’s decade‑long evolution, detailing product category growth, key concepts like SPU/SKU, business challenges and pricing models, a shift from LAMP to Java‑based architecture, and pioneering middleware such as TFS, Tair, HSF, TDDL, culminating in a massive open platform with hundreds of APIs.
