What level is Tianjin South Ring Railway Co., Ltd.?

Tianjin South Ring Railway Co., Ltd. is a state-owned enterprise. Tianjin South Ring Railway Co., Ltd., formerly known as Tianjin Railway Group Co., Ltd., was jointly funded by the Ministry of Railways, Tianjin Railway Group Co., Ltd. and Tianjin Railway Investment Company in June 2009 and became a joint venture railway company controlled by the Ministry of Railways.