彩票半全场胜负 www.eiydbg.com.cn Following the development of urban construction, it keeps increasing the people’s life standard. Especially under the circumstance of more and more serious ageing of population, people eagerly want to install elevators in old multi-storey buildings so as to solve the difficulty of up / down for the old. Old buildings have no elevators. Therefore people intend to install new elevators in those old buildings. Undoubtedly, it is a project for the benefit of the people.