it has nothing to do with submission time but the completion time. your application wont be forwarded to admission committee unless it is complete. i saw a few ppl who submitted one day before deadline and got interviews.
in the past, there were some people who indeed received interview invites after the first wave. and some even were admitted with very late interviews. i do not know if this is the case in China.
i have no expectations. i am ready for rejections. LOL. MIT hurt my feelings twice already. no problem for the third time.