18 The cities are Zhengzhou, Kaifeng, Luoyang, Pingdingshan, Jiaozuo, Hebi, Xinxiang, Anyang, Puyang, Xuchang, Luohe, Sanmenxia, Nanyang, Shangqiu, Xinyang, Zhoukou, Zhumadian and Jiyuan.

Henan is an important economic province in China, with the GDP in 20 17 being the fifth in China and the first in the central and western regions. Zhengzhou Commodity Exchange is the first inland futures exchange in China.

Extended data:

During the Longshan culture and Erlitou culture more than 4,000 ~ 5,000 years ago, Henan entered the era of coexistence of stone tools and bronzes, and private ownership and class sprouted, and then the first dynasty in China's history-Xia Dynasty, with its capital in Yangcheng (now Wang Chenggang site in Dengfeng, Zhengzhou), Yangzhai (now Yuzhou site in Xuchang) and Zhongzhong (now Erlitou site in Xiadu, Yanshi, Luoyang).

20 16 16 On February 28th and 29th, the State Council and the National Development and Reform Commission successively approved and issued the Central Plains Urban Agglomeration Development Plan, positioning the Central Plains Urban Agglomeration as a new growth pole of China's economic development, an important advanced manufacturing and modern service industry base in China, a pioneering area for innovation and entrepreneurship in the central and western regions, a new highland for two-way opening in inland areas and a demonstration area for green ecological development.

Henan has a warm temperate to subtropical, humid to semi-humid monsoon climate. It has the characteristics of distinct seasons, simultaneous rain and heat, and complexity and diversity. From south to north, the annual average temperature in the whole province is15.7-12.1℃. Generally, the temperature is -3℃ to 3℃ in January and 24℃ to 29℃ in July. The temperature in the whole province is generally characterized by high in the east and low in the west and high in the south and low in the north.

Reference: Henan-Baidu Encyclopedia