Generally speaking, banks only look at the original contract and keep a copy. The original should be kept by the buyer, including the original real estate license and the original land certificate with real estate mortgage.

However, each bank also has different requirements, and the specific situation is recommended for consultation.

However, the original is best kept by the buyer. If the bank must keep the original, it shall issue a valid receipt to the buyer, and affix the bank seal on the copy, indicating that the copy is consistent with the original, and affix the riding seal on the page.