Nanning is the capital of the Guangxi Zhuang Autonomous Region in southern China. It is known as the "Green City " because of its abund…Nanning is the capital of the Guangxi Zhuang Autonomous Region in southern China. It is known as the "Green City " because of its abundance of lush subtropical foliage. Located in the South of Guangxi, Nanning is surrounded by a hilly basin, with a warm, monsoon-influenced humid subtropical climate.