How Xiaohongshu’s Security Team Achieved Zero Defense Losses in Shanghai’s 2024 “Panshi Action”

In December 2024, Xiaohongshu’s information security team topped the Shanghai “Panshi Action” competition, earning top blue‑team honors and a zero‑loss defense record by leveraging real‑time traffic monitoring, big‑data analytics, rapid incident response, and successful attacker attribution.

Information Securitybig data analysiscybersecurity

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How Xiaohongshu’s Security Team Achieved Zero Defense Losses in Shanghai’s 2024 “Panshi Action”

Dada Group Technology

Sep 13, 2021 · Backend Development

Design and Evolution of a High‑Performance Massive Distance‑Calculation Service at Dada Group

This article details Dada Group’s transition from a Redis‑based, low‑throughput distance‑calculation system to a high‑concurrency, low‑cost architecture leveraging GEOHASH indexing, cache sharing, and asynchronous processing, achieving billions of daily point‑pair calculations with sub‑100 ms latency and high value‑rate.

GeoHashSystem Architecturebig data analysis

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Design and Evolution of a High‑Performance Massive Distance‑Calculation Service at Dada Group

Efficient Ops

Aug 23, 2016 · Mobile Development

How Tencent Cut Mobile QQ/Qzone Lag with Network & Client Optimizations

This article details Tencent's practical approaches to reducing user‑perceived latency in mobile QQ and Qzone by analyzing server, network, and client delays, employing private protocols, multi‑path connection strategies, real‑time monitoring, and big‑data clustering to identify and fix performance bottlenecks.

Operationsbig data analysisclient monitoring

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How Tencent Cut Mobile QQ/Qzone Lag with Network & Client Optimizations