Hi @englianhu. The system automatically hid your posts from view via discourse's auto-flag system, and I manually unhid the obviously good posts.
I am not entirely sure what triggered the flags in this case. Discourse just said they were possibly spam - perhaps the trigger was several long'ish posts in quick succession with links and images, but not sure.
I upped your discourse trust level so I don't think you should have this auto-hide issue going forward.