If the owner wants to change the property, he can do it at the same time.

The owner wants to change the property, not at the same time. Only the industry Committee can vote for the property change, not at the same time. The owners' committee may change the property company. Changing a property company requires convening a general meeting of owners, voting on the dismissal of the property company, and counting the voting results. If it meets the standard, you can dismiss the existing property company and hire a new one.