Thanks for the tip. Because in my application page it says "we don't need additional doc, we'll contact you if this changes". I was also not sure how effective the webform is and saw some YouTube video that said they'll request the doc if needed. The reason I didn't send the doc in the first place is because it's upload position is in the "Optional documents" section(Neither is that doc in the application docs list from China). I know the additional docs such as letter of explanation are uploaded under the same section but I had enough info about that. I only found out IMM5257 might have been mandatory after some time. Anyway I'll send them now. Thanks a lot.Why do you need to wait for them? Send the document via a webform.
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