A technician works at Guangyuanxincun Subway Station on Guangzhou Subway Line 11, in Guangzhou, south China's Guangdong Province, Feb. 26, 2020. Major construction projects in Guangdong-Hong Kong-Macao Greater Bay Area have resumed at different levels and areas, with multiple measures in prevention and control of the novel coronavirus disease (COVID-19) on the construction sites. (Xinhua/Lu Ye)

Workers work at the construction site of Shilou section of Foshan-Dongguan intercity railway in Guangzhou, south China's Guangdong, Feb. 26, 2020. Major construction projects in Guangdong-Hong Kong-Macao Greater Bay Area have resumed at different levels and areas, with multiple measures in prevention and control of the novel coronavirus disease (COVID-19) on the construction sites. (Xinhua/Liu Dawei)

Technicians work at Guangyuanxincun Subway Station on Guangzhou Subway Line 11, in Guangzhou, south China's Guangdong Province, Feb. 26, 2020. Major construction projects in Guangdong-Hong Kong-Macao Greater Bay Area have resumed at different levels and areas, with multiple measures in prevention and control of the novel coronavirus disease (COVID-19) on the construction sites. (Xinhua/Liu Dawei)

Workers have their body temperature checked before entering the construction site of B3 section of Pearl River Delta Water Resources Allocation Project in Guangzhou, south China's Guangdong Province, Feb. 26, 2020. Major construction projects in Guangdong-Hong Kong-Macao Greater Bay Area have resumed at different levels and areas, with multiple measures in prevention and control of the novel coronavirus disease (COVID-19) on the construction sites. (Xinhua/Liu Dawei)

Aerial photo taken on Feb. 26, 2020 shows the construction site of B3 section of Pearl River Delta Water Resources Allocation Project in Guangzhou, south China's Guangdong Province. Major construction projects in Guangdong-Hong Kong-Macao Greater Bay Area have resumed at different levels and areas, with multiple measures in prevention and control of the novel coronavirus disease (COVID-19) on the construction sites. (Xinhua/Liu Dawei)