What does the property contract system mean?

Owners pay fixed property service fees to property management companies.

Property service charges include contract system or contract gratuity system. The contract responsibility system means that the surplus or loss of property fees charged by the property company to the owner is shared or borne by the property company. The reward system means that the property company receives the property operation funds from the owner in advance, and the property company extracts the rewards according to the contract, and the balance or deficiency of the funds is shared or borne by the owner.