Zhang bought a house by mortgage payment in a development company (the property right certificate has not been processed yet, and the development company guarantees it). Because Zhang owed money to Li, Li sued Zhang to the court. The court awarded the house that Zhang had mortgaged in the development company to Li, and at the same time ruled that the mortgage loan was returned by Li, and informed the development company to assist in the implementation. However, Zhang and Li Wei repaid the loan, which caused the loan to default. The bank informed the developer to ask the developer to be responsible for repayment. Developers feel very wronged. Developers believe that the buyer's failure to repay is a breach of contract, and should cancel the purchase contract, recover the house, and be responsible for repaying the bank loan, while the court said that it should discuss with Li, who neither repays nor cooperates with the buyer to repay.