Is the relocation house sale agreement valid?

I think: this house sale and purchase agreement is invalid.

According to China's current laws and regulations, the transfer of real estate must be registered for the change of property rights. The house purchase and sale agreement can only take effect after being registered by the relevant registration authority. The terms agreed by both parties to take effect are not in compliance with the law. According to the relevant provisions of the General Principles of Civil Law, although the agreement meets the conditions for establishment, it did not come into effect because it was not registered. The ownership of the house has not been transferred.

However, although the agreement is valid, it is still binding on both parties, and the transferee may require the buyer to continue to perform its obligations and assist in the registration of property rights change. Otherwise, bear the responsibility for contracting fault.