360 kilometers. According to Baidu map, Zhengzhou is 360 kilometers away from Changsha, Hunan Province, and it takes 3 hours by high-speed train, passing through Changzhi City. Zhengzhou, called "Zheng" for short, was called Shangdu in ancient times. It is the capital of Henan Province, a megacity and the core city of Central Plains urban agglomeration, and an important central city in Central China determined by the State Council.