https://blog.wongcw.com/2018/12/17/oppo-r17-r17-pro%e6%96%b0%e5%b9%b4%e7%89%88%e7%8f%be%e5%a0%b4%e9%ab%94%e9%a9%97%e4%b8%8a%e6%89%8b/