First of all, I suggest you go to the loan department of China Merchants Bank to make a specific inquiry.
Can China Merchants Bank give you a real estate loan?
If not, you'd better call the so-called Agricultural Bank of China.
Tell him to consult his bank,
There is nothing to prove at the beginning of buying a house. When you go, you can verify whether the other party is from the bank.
In addition, you will have a receipt or invoice after paying the money, and you must have the financial seal of the Agricultural Bank of China.
I hope I can help you.