Personally, it depends on the age structure and quality of old buildings, which requires the state to formulate a standard. For example, the structural quality of old buildings can no longer withstand the pressure of transformation, and they will be rebuilt without transformation, which is a legitimate dangerous building. This kind of building should be demolished. Short life, good quality, but incomplete facilities, can withstand decoration, decoration. What is important is that the state should introduce standards that can be changed or not, and whether it should be dismantled or not. Don't do bad things with good intentions and waste money.