I had a good chat with a WeChat friend, but the other person suddenly didn't return the message. What happened?

I had a good chat with a WeChat friend, but the other person suddenly didn't return the message. What happened? Look at what you said about this WeChat friend. It should be something temporary, otherwise it will not fail to reply to your message. It is impolite for people not to reply to messages, especially in the process of chatting. The other party's sudden failure to reply to the message means that the other party must be in a hurry, so I don't want to say hello to you. You don't need to think too much. It is definitely not your problem. Don't worry, the other person will definitely reply to you in time when he is busy.