Hi wu qin,
you posted your question to Communities Feedback forum, which is not intended to discuss product issues, but it's the place where to discuss the web itself.
Please move your question to Chinese forum or place your question in English to civil forum and delete this one. To move your post, use Move tool in More menu under your original post, but please do not create a new question without at least deleting original one to don't polute forum(s) with duplicated questions.
Labyrinth Technology | dev.notes() | cad.point
Thank you. Excuse me.