Yin Cheng, a teacher from Tsinghua University, and a global valuable expert from Microsoft, gave lively and interesting lectures, explained them in simple terms, and enriched the whole set of video content. The whole course, with C language as the core, has a complete and wonderful exercise of data structure, algorithms, design patterns, databases, high concurrency retrieval of big data, file redirection, multithread synchronization, process communication, hacker hijacking technology, network security Encryption and decryption, as well as various wonderful small projects, are very suitable for everyone to learn!