Hello, according to the provisions of my country's contract law and relevant laws and regulations, an effective house purchase and sale agreement should include the following parts:

1. Buyer and seller The basic identity information of both parties;

2. The basic information of the house, such as the geographical location, area size, etc. of the house;

3. The price, payment method and payment time of the house and the delivery method. In addition, the liability for breach of contract also needs to be agreed upon, signed by both parties and written with the time.