Can the property be demolished at will and turned into a garbage pool? Is it legal?

No, it's illegal. According to the Property Law of People's Republic of China (PRC), the green space in residential area belongs to the owner, and it is not allowed to destroy the green space and build a garbage pool without the consent of the owner. Property management company is an enterprise-type economic entity with corresponding qualifications established in accordance with legal procedures and an independent enterprise legal person. It belongs to a service enterprise and has an equal subject relationship with the owners or users. Entrusted by the owners, in accordance with the provisions of relevant laws and regulations or the provisions of the contract, the professional management of the property in a specific area, and collect corresponding remuneration, and accept the supervision of the owners' Committee and all owners.