Guangzhou residential buildings, the installation of elevators consultation to the local housing and construction bureau to reflect the situation. Please refer to the documents of the Planning Commission for details. It depends on your Guangzhou area to make a final conclusion on the contents of installing elevators in old buildings over 40 years old. All problems need to be properly solved before they can be dealt with. In order to improve communication efficiency, please call for detailed communication. Refer to the documents of Planning Commission for details.