First of all, it doesn't matter if there is no admission notice. This notification is only used when you migrate your account. If you want to shift gears, you only need a shift letter issued by Tianjin Vocational and Technical Teachers College.

Secondly, you can choose to pick up the documents yourself or mail them. If you submit it yourself, you should submit it to the College Archives Management Section when you enter the school. If you mail it, you must take it out yourself or entrust someone else. Then you deliver it yourself. If you want to get the files yourself, take the file transfer letter+ID card (copy); If you entrust someone else, just take the file transfer letter+power of attorney+copy of ID card+original ID card of the handler.

PS: I graduated from Tianjin University of Finance and Economics and was admitted to Guizhou University as a graduate student. I have been in this situation.

Write about the unit where your file is located, not about the talent exchange market. These are the two options for your supplementary question.