First of all, you need to register a user name in Beihai 365, remember it, and then after 24 hours, you can post with your user name (remember to log in after opening the webpage). Then find the topic or post you are interested in, click, pull to the bottom, see a dialog box, enter what you want to say, and click Submit. If you don't understand, you can look at the bottom of the homepage of Beihai 365. There is a novice teaching section that teaches you how to post, how to change your avatar, how to send photos ... a lot, explore slowly by yourself, and you will soon get started.