Chongqing Andao Elevator Engineering Co., Ltd., Chongqing Yuhui Elevator Co., Ltd., etc. According to the official website of Chongqing Municipal Affairs Service Center, we learned that elevator installation companies in old communities in Bishan District include Chongqing Andao Elevator Engineering Co., Ltd., Chongqing Yuhui Elevator Co., Ltd., Bicheng Street and Schmidt Elevator Company, etc. Bishan District is affiliated to Chongqing City and is located in the upper reaches of the Yangtze River, in the west of Chongqing City, and within the Chongqing metropolitan area.