(The content of the course will lead students to create a billion-level flashkill architecture system comparable to Taobao. The course content includes service architecture, basic data processing, and real-time collection of hot data. In the implementation stage of the data consistency scheme for flash sales, the last part of the course focuses on the high-concurrency processing scheme to help the course to a higher level. In addition, the course also uses many popular technologies such as log collection, real-time log analysis, Sentinel, Seata, Netty, etc., so that students can better improve JAVA enterprise-level technology.)