What if the landlord refuses to refund the deposit and deducts the property fee to lock the money?

It depends on how the contract is agreed. There is no special agreement. In theory, whoever uses the house will actually bear the property fee. As the owner, the landlord has been recognized by the property management company, but he has the right to seek compensation from you after paying in advance. Unless your contract clearly stipulates, the property fee is included in the rent or agreed that the property fee shall be borne by the owner.