| | Spatial correlation mode | Region |
| | High-high concentration (HH) | Shenzhen, Guangzhou, Shanghai, Hangzhou, Chongqing, Ningbo, Wuhan, Tianjin, Nanjing, Xiamen, Xi'an, Changsha, Suzhou, Dongguan, Wenzhou, Wuxi, Yichang, Foshan, Changzhou, Zhuhai, Jiaxing, Yueyang, Hefei, Wuhu, Zhongshan, Shantou, Weihai, Taizhou, Nantong, Liaoyuan, Luoyang, and Huizhou |
| | Low-high concentration (LH) | Shijiazhuang, Hohhot, Zhenjiang, Shaoxing, Yangzhou, Hengyang, Putian, Yantai, Tangshan, Lishui, Huangshan, Yuncheng, Zhangzhou, and Daqing |
| | Low-low concentration (LL) | Jinan, Changchun, Nanchang, Yinchuan, Haikou, Urumqi, Kunming, Nanning, Lanzhou, Lhasa, Xining, Xianyang, Weifang, Mianyang, Yi, Jiujiang, Baotou, Longyan, Fuyang, Baoshan, Yingtan, Wuhai, Xinyu, and Linyi |
| | High-low concentration (HL) | Beijing, Chengdu, Harbin, Dalian, Shenyang, Qingdao, Guiyang, Fuzhou, Zhengzhou, Taiyuan, Jinhua, Quanzhou, and Ningbo |
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