Spatial Character and Backflow Pattern of High-Level Returned Talents in China

Table 4

City hierarchical structure in China.

Type of city	Number	Cities example
National core city	4	Beijing, Shanghai, Nanjing, and Wuhan
Regional excellent city	23	Hefei, Guangzhou, Hangzhou, Chengdu, Xi’an, and so on
Regional special city	25	Mianyang, Xianyang, and so on
Sum	52