What if I accidentally go in and receive an unknown message from gambling sites?

There is nothing wrong with not entering personal information. This kind of thing should be reported, and it is best to stay away from gambling at the expense of others. I also suggest that you don't click on that kind of link casually. Some of them are viruses, so it's best not to click on them.

If your mobile phone number has Alipay enabled, you may use this to reset your Alipay password and so on. Or your mobile phone has opened online banking, and use this to steal your online banking. For security reasons, it is recommended to modify all important passwords.