I accidentally added my predecessor's WeChat, and he passed it and sent me a message: What happened? What should I reply to?

From your description, we can see that this is a very careful person who cares about you from all aspects of life. You should observe carefully. If he is only good to you, then he cares about your health and your safety. He must like you. He didn't say directly. He wants to prove it with his actions and make you feel it. Now that you feel his kindness, you can get to know him better. If you are interested in him, seize the opportunity. There are not many such boys. There are too many careless people. Some people can only devote themselves to their work and need help from others in their daily lives. You meet such a careful person and care about you very much. He likes you. It is much easier to get someone who loves you than to pursue someone you love. If he does this to you, you should repay him with your heart, make more contacts, enhance friendship, let friendship develop into love as soon as possible, get a happy marriage and a happy life. Wish you success!