If you are very familiar with each other, you can say whatever you want. Generally, you start a chat by saying hello. Find the same topic when chatting. The minimum requirement for communicating with the opposite sex is to have the same topic so that two people can have something to talk about. If you don’t know what the same topic is, just look at the conversations between both parties. Hobby, and then you can start a chat topic about it. If it’s someone of the opposite sex you don’t know, then that’s fine! ! As long as it’s not too extreme, it’s ok! !