First of all, for political reasons, mainland China has blocked Google and turned to built-in Baidu search (Baidu search and its difficult to use) in mobile phones. Second, the mainland China version of Samsung mobile phone has built-in many mainland China's "rooligan apps", such as Baidu, Taobao, JD.com, Tencent, Security Guard 360, etc. Third, for political reasons and the so-called national security, the Chinese version of Samsung mobile phones has castrated some foreign versions of Samsung mobile phones with their default functions, such as: very easy-to-use Samsung Pass, and Samsung Pay lock zone (can only bind UnionPay banks issued by mainland Chinese banks) Card, unable to bind the bank card of other payment organizations)