Legal basis: Article 89 of the Civil Code of People's Republic of China (PRC), the parties may agree that one party shall pay a deposit to the other party as a guarantee of creditor's rights. After the debtor performs the debt, the deposit shall be used as the price or recovered. If the party paying the deposit fails to perform the agreed debt, it has no right to demand the return of the deposit, and if the party receiving the deposit fails to perform the debt, it shall return the deposit twice.