Legal Analysis: On October 20 15+ 165438 10/0, through the mediation of a real estate agency in Nanjing, Party A and Party B signed a real estate sales contract, stipulating that Party B would sell his house in a certain room in Gulou District of this city, and both parties clearly agreed on the contract price and payment time. On the day of signing the contract, Party A paid Party B a deposit of 6,543,800 yuan+200,000 yuan and an agency fee of 45,000 yuan. After the signing of this contract, Party B fails to perform the corresponding contractual obligations as agreed in this contract. Because Party B can't solve the mortgage problem of its house, Party A, Party B and a real estate agency still can't solve it after repeated consultations.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 562 The parties may terminate the contract through consultation.

The parties may agree on the reasons for one party to terminate the contract. When the reasons for the termination of the contract arise, the creditor may terminate the contract.

Article 563 The parties may terminate the contract under any of the following circumstances:

(a) the purpose of the contract cannot be achieved due to force majeure;

(two) before the expiration of the time limit for performance, one party clearly indicated or indicated by his own behavior that he would not perform the main debt;

(three) one party delays the performance of the main debt and fails to perform it within a reasonable period after being urged;

(4) One of the parties delays the performance of debts or commits other breach of contract, which makes it impossible to achieve the purpose of the contract;

(5) Other circumstances stipulated by law.

For an indefinite contract whose content is to continue to perform debts, the parties may terminate the contract at any time, but they shall notify the other party before a reasonable time limit.

Article 564 The time limit for exercising the right of revocation shall be prescribed by law or agreed by the parties. If the parties fail to exercise their rights at the expiration of the time limit, the rights shall be extinguished.