An employee works at the transit center of Zhongtong Express in Shanghai, east China, Nov. 12, 2019. (Photo by Wang Xiang/Xinhua)

  Aerial photo taken on Aug. 27, 2019 shows cargo ships at a wharf of Wenfeng port in the China (Hebei) Pilot Free Trade Zone Caofeidian area in north China's Hebei Province. (Xinhua/Yang Shiyao)

  People work at a garment company in China (Yunnan) Pilot Free Trade Zone (FTZ) Dehong Area in Dehong, southwest China's Yunnan Province, Nov. 4, 2019. (Xinhua/Jiang Wenyao)

  A customer selects vegetables at a supermarket in Wuxi City, east China's Jiangsu Province, June 12, 2019. (Xinhua/Huan Yueliang)

  A staff member works at an engineering machinery company in Kaiping District of Tangshan, north China's Hebei Province, Nov. 17, 2019. (Xinhua/Yang Shiyao)

  Photo taken on Oct. 23, 2019 shows artificial flowers during the 126th China Import and Export Fair, also known as the Canton Fair, in Guangzhou, south China's Guangdong Province. (Xinhua/Deng Hua)

  Photo taken on July 16, 2019 shows a workshop producing mobile phone frame parts at Huamao Electronics Group in Chang'an Town of Dongguan, south China's Guangdong Province. (Xinhua/Deng Hua)

  New energy vehicles are seen on the assembly line at Xi'an plant of BYD Auto in Xi'an, northwest China's Shaanxi Province, June 12, 2019. (Xinhua/Shao Rui)

  A staff member introduces exhibits to a visitor during the 2019 World Manufacturing Convention in Hefei, east China's Anhui Province, Sept. 20, 2019. (Xinhua/Zhang Duan)