It is illegal for a property company to sue the industry Committee.

This is legal. According to the Civil Procedure Law of People's Republic of China (PRC), a property company can sue the owners' committee of its own community. Owners' committee refers to a non-governmental organization composed of owners' representatives in the property management area, representing the interests of owners, reflecting the wishes and requirements of owners to all sectors of society, and supervising the management and operation of property management companies.