I didn't open it. I received a text message from Tenpay.

Hello, this may be someone else logging in to your Tenpay operation, and there are steps to verify the verification code of the mobile phone, so it was sent to your mobile phone. I suggest you change your QQ password. The verification code you received is not a scam message, but an official one of Tenpay.

You can ask me if you don't understand.