Preserve and protected your payment details just as soon as. Google will encrypt them and have them ready to be used at checkout on Chrome and on Android devices. 这里多说一句，苹果其实强调过，一些application在后台不老实，是会被强杀的。其实很多人遇到的杀后台严重问题，很多时候都是因为在使用流氓app啊！还有更重要的信息，那就是任何时候都没必要主动关闭application，这只会导致后续启动app更慢... https://elliotowwaf.is-blog.com/42437114/the-basic-principles-of-hbr-case-studies