Zhengzhou, the capital of Henan Province, is an important central city in central China, an important comprehensive transportation hub of the country [1] and a core city of the Central Plains Economic Zone [2]. It is located in the south of North China Plain, in the middle and lower reaches of the Yellow River, in the north of central Henan Province, with Kaifeng in the east, Luoyang in the west, Xinxiang and Jiaozuo in the north, Xuchang and Pingdingshan in the south, and between east longitude 168. [3-4]

Zhengzhou has a total area of 7446 square kilometers. By the end of 2065,438+05, it had jurisdiction over 6 municipal districts, 65,438+0 counties and 5 county-level cities. There are 1 national economic and technological development zones with a total population of 9.569 million. In 20 15 years, the city's GDP reached 7315.2 billion yuan. [5] Zhengzhou City is located in the hinterland of the Central Plains, with a temperate monsoon climate and four distinct seasons. It is located in the transition zone between the eastern Qinling Mountains and the second and third landforms of China. The overall terrain is high in the southwest and low in the northeast. [6-7]

Zhengzhou is a comprehensive transportation hub integrating highway, railway, aviation and communication in China. It is the "double cross" center of China's ordinary railway and high-speed railway network [8-9], with the largest train marshalling station in Asia and the largest LTL freight transfer station in China. [10- 12] Zhengzhou is also one of the important commodity distribution centers in China, and Zhengzhou Commodity Exchange is the first batch of pilot units in the futures market in China. [13] Zhengzhou Airport Area is the first approved national airport economic experimental zone in China. [14] Zhengzhou is also a part of the newly established China (Henan) Pilot Free Trade Zone. [ 15- 16]

Zhengzhou is a national historical and cultural city [1], known as the "Kung Fu Capital" [17], one of the important birthplaces of Chinese civilization, and the hometown of Xuanyuan Huangdi, the ancestor of Chinese humanities [18- 19]. It has been the capital and the eighth generation country for five times in history, and it is the "China". There are 15 world cultural heritage sites in the city, more than 70 national key cultural relics protection units, as well as many cultural and historical landscapes such as the hometown of the Yellow Emperor, the ruins of shopping malls and the center of heaven and earth [22].