Fig. 2: Regional division map of China’s four major regions.
From: Spatiotemporal evolution and convergence patterns of urban carbon emission efficiency in China

This figure outlines the selection of study objects. The division of the four major regions is primarily based on the China Statistical Yearbook. According to this source, Eastern China includes 10 provinces—Beijing, Tianjin, Hebei, Shanghai, Jiangsu, Zhejiang, Fujian, Shandong, Guangdong, and Hainan, Central China comprises 6 provinces—Shanxi, Anhui, Jiangxi, Henan, Hubei, and Hunan; Western China encompasses 12 provinces—Inner Mongolia, Guangxi, Chongqing, Sichuan, Guizhou, Yunnan, Tibet, Shaanxi, Gansu, Qinghai, Ningxia, and Xinjiang, and Northeastern China consists of 3 provinces—Liaoning, Jilin, and Heilongjiang.