I received a short message from the Meituan client inexplicably.

Obviously, someone else used your mobile phone number and placed an order on Meituan.

Maybe your account has been stolen. You don't need a mobile phone number to log in, just a password.

If you don't know this, you'd better log in to Meituan and change your password. Or permanently cancel the account. Do you want it? You can set it in your account. Protection related to account security.