Is it legal for the owner to sign the maintenance fund? How much is the compensation?

Illegal, no compensation is needed. The use of the maintenance fund is proposed by the property management unit, and it can only be reported to the municipal property maintenance fund management institution for approval after more than two thirds of the relevant owners agree and the owners' committee deliberates. The owner's signature has no legal effect, is illegal and will not be recognized by the unit, so there is no need for compensation. The maintenance fund shall be raised by the property owners themselves, and no individual may use it without authorization.