Table 1 Division of the Eight Comprehensive Economic Zones and their abbreviations.

From: Assessing and gauging the carbon emission efficiency in China in accordance with the sustainable development goals

Name of Economic Zone

Regional scope

Abridge

Northern Coastal Economic Zone

Beijing, Tianjin, and 27 cities in Hebei and Shandong provinces

EZ1

Northeast Economic Zone

29 Cities in Liaoning, Jilin, and Heilongjiang provinces

EZ2

Eastern Coastal Economic Zone

Shanghai and 24 cities in Zhejiang and Jiangsu provinces

EZ3

Middle Yellow River Economic Zone

40 Cities in Shanxi, Inner Mongolia, Henan, and Shanxi provinces

EZ4

Southern Coastal Economic Zone

32 Cities in Fujian, Guangdong, and Hainan provinces

EZ5

Northwest Economic Zone

6 Cities in Gansu, Qinghai, Ningxia, and Xinjiang provinces

EZ6

Southwest Economic Zone

Chongqing and 43 cites in Yunnan, Guizhou, Sichuan, and Guangxi provinces

EZ7

Middle Yangtze River Economic Zone

52 Cites in Hubei, Hunan, Jiangxi, and Anhui provinces

EZ8