The purchase agreement is valid, but it has not yet taken legal effect.

According to the provisions of Articles 32 and 44 of the Contract Law, if the parties conclude a contract in the form of a contract, the contract is established when both parties sign or seal it. A legally established contract shall take effect upon its establishment. Where laws and administrative regulations stipulate that examination and approval, registration and other procedures shall be handled, such provisions shall prevail. At the same time, Article 9 of the Property Law stipulates that the establishment, alteration, transfer and extinction of real estate rights shall take effect after being registered according to law; Without registration, it will not take effect, except as otherwise provided by law. Therefore, the house purchase and sale agreement was established when the buyer and the seller signed the agreement, but it has not yet taken legal effect. The house sales contract shall take effect from the date of registration of house property right transfer.

Hope to adopt, thank you.