Zhongshan district. The conference room of Dalian Economic Development Center in the next decade refers to the economic development service center, which is located in Zhongshan District according to Baidu map. Zhongshan District, which belongs to Dalian, Liaoning Province, is the financial and commercial center of Dalian. Located in the east of Dalian, with a total area of 43.85 square kilometers and a coastline of 42.53 kilometers.