2. Work certification documents, such as a copy of the work permit stamped with the official seal of the unit or the original work certificate issued by the unit;

3. Financial documents, such as: the original income certificate issued by the unit, or the original bank deposit certificate, or a copy of the salary record issued by the bank showing the name of the applicant, or a copy of the income tax withholding certificate, or a copy of its own real estate license, etc.