Because the down payment was not enough, the down payment was paid 20,000 yuan, which was included in the down payment. Inquiring about relevant information shows that the deposit of buying a house can be counted as the down payment. Under normal circumstances, property buyers will sign a down payment contract with the developer after selecting the house and pay a certain amount of down payment. When signing a house purchase contract, they will pay the down payment. According to the relevant theory of civil law, deposit has the legal characteristics of prepayment. Only after the contract is established and delivered can it be fulfilled, so as to play the role of guarantee. The down payment is not a down payment, but it can be included in the down payment. For example, a down payment of 200,000 yuan is required. If the party has paid the down payment of 20,000 yuan, it can pay 6,543,800 yuan+0.8 million yuan when paying the down payment.