How can I refuse when someone talks about my family affairs?

Simple, change the topic. Talk about something else and answer the question. If he has some emotional intelligence, he should know that you don't want to answer and you want to avoid it.

If you continue to ask, I think you can say: Let’s talk about your family first. Or answer his question with a question. After all, it is very rude to ask someone about other people's family affairs. He asked first, so he was rude first and continued to ask, which seemed reckless. Also, should he talk about himself before asking? Let the other party know about the matter, and then take the initiative to ask.

Maybe Chinese people don’t pay much attention to personal privacy and talk about everyday things. . Alas, I am too embarrassed to refuse openly, so I can only choose to compromise. For specific questions, you can try to follow my ideas.

It’s tiring to chat with people with low emotional intelligence.

I hope the author of the question will adopt it.