Database
https://github.com/pingcap/awesome-database-learning
https://dbgroup.cs.tsinghua.edu.cn/ligl/courses_cn.html
https://15445.courses.cs.cmu.edu/fall2024/
WatchFace
https://github.com/muzihuaner/watch
https://www.kittenbot.cn/doc/hardware/future/%e7%bb%bc%e5%90%88%e9%a1%b9%e7%9b%ae/%e6%9c%aa%e6%9d%a5%e6%9d%bf%e5%a4%aa%e7%a9%ba%e4%ba%ba%e6%89%8b%e8%a1%a8/index.html