A city development exhibition is held during the 2020 China Observance of World Cities Day in Fuzhou, capital of southeast China's Fujian Province, Oct. 31, 2020. (Xinhua/Wei Peiquan)

A forum is held during the 2020 China Observance of World Cities Day in Fuzhou, capital of southeast China's Fujian Province, Oct. 31, 2020. (Xinhua/Wei Peiquan)

A city development exhibition is held during the 2020 China Observance of World Cities Day in Fuzhou, capital of southeast China's Fujian Province, Oct. 31, 2020. (Xinhua/Wei Peiquan)

The Fuzhou Strait International Conference & Exhibition Center, the venue of the main forum of the 2020 China Observance of World Cities Day, is seen in Fuzhou, capital of southeast China's Fujian Province, Oct. 31, 2020. (Xinhua/Wei Peiquan)