Add my name after receiving the message.

The high probability has no effect. If the other party will be an insurance salesperson, an advertising agent, a real estate agent, or even answers to some test questions, such people may have purchased your communication information from others. These people want to add you to WeChat, probably because they want to sell their goods to you. Of course, we can't rule out that some friends who haven't contacted for a long time suddenly come to you and want to contact you. Well, some of them are frauds. If there is fraud, you'd better not answer the phone.