Can the developer's own property company subcontract its business to other property companies?

No, the developer should sign a contract directly with the bidding company.

According to Article 40 of the Property Management Regulations, a property service enterprise may entrust the special service business within the property management area to a professional service enterprise, but may not entrust all the property management within the area to others.

Article 62 Where a realty service enterprise, in violation of the provisions of these Regulations, entrusts all the realty management within the realty management area to others, the real estate administrative department of the local people's government at or above the county level shall order it to make corrections within a time limit and impose a fine of more than 30% and less than 50% of the entrusted contract price; If the circumstances are serious, the qualification certificate shall be revoked by the department that issued the qualification certificate. The entrusted income is used for the repair and maintenance of * * * parts and * * * facilities and equipment in the property management area, and the rest is used according to the decision of the owners' meeting; If losses are caused to the owners, they shall be liable for compensation according to law.