Is the rating report of China Railway Guokong (Guangxi Energy Investment Co., Ltd.) 2a or 3a?

2a+.2021July 19, United Credit Rating Co., Ltd. comprehensively analyzed and evaluated the long-term credit status of Guangxi Guangtou Energy Co., Ltd., and determined that the long-term credit rating of Guangxi Energy Investment Co., Ltd. was AA+ and the rating outlook was stable. Guangxi Guangtou Energy Group Co., Ltd. was established in 2003, mainly engaged in energy investment and management; Development and management of hydropower resources, thermal power resources and wind power resources.