Bayi pavilion station exit/entrance b. Zhongshan Road, over the rainbow Subway Station, Exit B, Zhongshan Road Station is a station of Tianjin Metro Line 3. Located in Hebei District, Tianjin, the number on Line 3 is 18, and you can transfer to Tianjin Metro Line 7 (under construction), which was opened and put into use on October 1, 212. Zhongshan Road in Nanjing, located in the main city of Nanjing, is the earliest Zhongshan Road in China. It was built to welcome Dr. Sun Yat-sen's coffin, hence its name.