Maintenance fund, also known as "public maintenance fund" or "special maintenance fund", refers to the funds paid by the owners for the maintenance, conservation and transformation of public parts and facilities in the property area after the warranty period expires.

"Measures for the Administration of Residential Special Maintenance Funds" stipulates that

The scope of use of the maintenance fund mainly includes the public parts and facilities of the community. Specifically, the public part refers to the part owned by the owner in a single house or shared by the owner and the non-residential owner connected with the structure in a single house, including foundation, load-bearing wall, column, beam, floor, roof, outdoor wall, hall, stairwell, corridor and so on. * * Facilities and equipment used generally include elevators, antennas, lighting, fire-fighting facilities, green spaces, roads, street lamps, ditches, pools, wells, non-operating garages, public cultural and sports facilities and houses.

* * * spare parts, * * facilities and equipment warranty expires; Where the maintenance, renewal and renovation of the * * * part of the house and the * * * facilities and equipment involve the owner of the building, the applicant has sought the written consent of more than two thirds of the owners in advance; Involving all owners of the property management area, it has been agreed in writing by the owners' meeting, and the exclusive part accounts for more than two-thirds of the total construction area and accounts for more than two-thirds of the total number of owners.

So after two-thirds of the people agree, they can use the maintenance fund to invest in the renovation project of the old elevator.