System Design is a Chinese-language collection of detailed solutions to classic architecture interview problems. It teaches readers how to break broad product requirements into components, data flows, storage choices, scaling strategies, and operational tradeoffs. The examples cover URL shortening, news feeds, search engines, crawlers, key-value stores, distributed identifiers, task schedulers, file-system caches, and load balancers. Additional material discusses API rate limiting, hash maps, PageRank, frequent-item analysis, and big-data scenarios. ...