https://blog.wongcw.com/2022/08/05/oppo%e9%a6%96%e6%ac%be%e8%b1%8e%e5%90%91%e6%8a%98%e7%96%8a%e6%97%97%e8%89%a6%e8%9c%bb%e8%9c%93%e5%ae%9a%e5%90%8d%ef%bc%9aoppo-find-n-flip/