1, first-tier second-tier cities are based on the comprehensive strength of each city as the basic standard.

2, first-tier cities

The first-tier cities refer to the metropolis that is in an important position in the national political, economic and other social activities and has a dominant role and radiation-driven ability, in the city scale, infrastructure, culture, consumption and other levels, the first-tier cities are generally ahead of other cities. It is mainly reflected in the level of urban development, comprehensive economic strength, radiation-driven ability, attractiveness to talents, information exchange capacity, international competition, scientific and technological innovation, transportation accessibility and other levels, first-tier cities in the production, services, finance, innovation, circulation and other social activities in the country to play a leading role in leading and radiation and other leading functions. They can be divided either by administrative level, or by city size and population size, or by criteria such as level of economic development and total GDP. The first-tier cities in mainland China are: Beijing, Shanghai, Guangzhou and Shenzhen.

2. Second-tier cities

The second-tier cities have a certain economic foundation and relatively strong commercial activity, which are attractive to big companies, big brands and excellent talents, and are also becoming or will soon become the focus of layout of big companies in the next few years. They are Suzhou, Ningbo, Xuzhou, Zhenjiang, Quanzhou, Huai'an, Nantong, Changzhou, Hefei, Taiyuan, Yangzhou, Daqing, Nanning, Guilin, Baotou, Hohhot, Kunming, Harbin, Wenzhou, Zhuhai, Guiyang, Foshan, Zhongshan, Jiaxing, Zhengzhou, Nanchang, Dongguan, Weihai, Linyi, Huizhou, Changchun, Yantai, Shijiazhuang, Luoyang, Weifang, Xianyang, Chengdu.