Nanjing Metro Line S9 (also known as Nanjing Metro Line) is the ninth line completed and put into operation in Nanjing Metro. It was officially put into operation on December 30, 2017, and its logo color is bright yellow. 

Nanjing Metro Line S9 starts from Xiangyu Road South Station in the north and is arranged along Jiangjun Road, Lima Expressway, S243, Ning-Gaoxin Corridor, Guchenghu Road, Wutai Road (S239), and Dongshigu Road. When crossing Shijiu Lake, the three bridges stand side by side on one. In the middle is the subway bridge across the lake. The bridges on both sides are the roads of the Ning-Gaoxin Corridor. After reaching Tuanjiuwei Station, they continue south and reach Gaochun Station in the south.

Nanjing Weiman Door Industry has rich project experience and a complete product series in the field of rail transit. In terms of door type configuration and accessory selection, it conducts technical research and development and improvement closely around the actual needs of the rail transit environment. For this market segment, we provide fire doors, fire and smoke doors, fire enclosed doors, fire and sound insulation doors, wind pressure resistant fire doors, fire exit fire doors, emergency escape doors, steel interior doors, rolling shutter doors, door control hardware and other series of products. Currently, the company has cooperated with many domestic rail transit systems, such as: Nanjing Metro Line 3, Nanjing Metro Line 4, Nanjing Ninggao Line S9, Shanghai Metro Line 5, Changzhou Metro Line 1, Chongqing Rail Line 5, Chongqing Rail Line 10, Fuzhou Metro Line 2, etc.