Hi @changkun - Welcome to Steemit. I noticed you are posting a lot of posts very quickly. You are welcome to do that, but you should know that after your first 4 posts within 24 hours, your payout weight will start to go down. This means that a post will make less than if you had only posted 4 or less within the last 24 hours. It is to prevent people from spamming the system with a lot of posts.
Thank you very much for letting me know that.