The new owner of the second-hand house did not sign the property contract.

Before signing the house sales contract. The realty service contract refers to the service contract signed between the realty service enterprise and the owners' committee, which stipulates that the realty service enterprise shall carry out professional maintenance, conservation, management and maintenance of the environmental sanitation and public order in the relevant areas, and the owners shall pay remuneration. Article 502 of the Civil Code, a contract established according to law shall come into effect upon its establishment, unless otherwise provided by law or agreed by the parties.

Legal objectivity:

Article 938 of the Civil Code of People's Republic of China (PRC) generally includes service items, service quality, service fee standards and collection methods, use of maintenance funds, management and use of service places, service term and service handover. The public service commitment made by the property service provider in favor of the owner is an integral part of the property service contract. The realty service contract shall be in written form.