Hello, generally speaking, the purchase contract can be signed with the developer after the down payment is paid. Generally there are 2 copies of the official contract, the original developer will keep one, and one for the bank, so the buyer can't get the purchase contract until the loan is paid off. However, after signing the contract 1 month or so you can borrow the original contract with the developer to make a copy, you can also look at the other did not see the content, however, generally you find any problems with the developer is not changed.
Wish to adopt