https://blog.wongcw.com/2021/07/25/oppo-watch-2%e6%b3%84%e9%9c%b2%e7%9a%84%e5%9c%96%e7%89%87%e9%a1%af%e7%a4%ba%e5%85%b6%e5%8c%85%e5%90%ab%e9%80%9a%e8%a9%b1%e5%8a%9f%e8%83%bd/