Does the property have the right to keep a copy of the purchase contract?

Legal analysis: have power. If you are not at ease, you can write "for property filing only" on the copy. The property can know the information of the house by doing this.

Legal basis: Regulations on Property Management

Article 35 A realty service enterprise shall provide corresponding services in accordance with the stipulations of the realty service contract. The realty service enterprise fails to perform the realty service contract, causing personal and property safety damage to the owner, and shall bear corresponding legal responsibilities according to law.

Thirty-sixth property services companies to undertake the property, it should cooperate with the owners' committee for property acceptance procedures. The owners' committee shall hand over the information specified in the first paragraph of Article 29 of these regulations to the realty service enterprise.