First open Douyin, follow the user you want to send a private message to, then click on the other party's homepage, find the "Send Private Message" button, click to open the private message page, and send the words or pictures you want. But please note that if you are not a friend, you can only send three messages. Sometimes some people cannot send private messages. In that case, you should follow the other party first, and if you have works, you can comment on your thoughts under his works.