Why Taobao shopping sometimes needs SMS confirmation, and sometimes it doesn't? It's not safe.

It's simple. Only when the mobile phone is bound, verification is required for general shopping payment. This is for the security of your account, and the rest is basically not verified. Anyway, when it comes to money, you don't have to worry about security as long as it is verified. If you are not at ease, you can also install digital certificates and login protection. After login protection is set, you will need to verify every login, and finally you will buy Alipay tokens. However, this generally has a greater impact on sellers and buyers.