
Engineers work in the central control room of Sahiwal coal-fired power plant in Sahiwal, Pakistan, Jan. 24, 2021. (Xinhua/Li Hao)

Technicians check the running status of the equipment at Sahiwal coal-fired power plant in Sahiwal, Pakistan, Jan. 25, 2021. (Xinhua/Li Hao)

Photo taken on Jan. 26, 2021 shows a view of Sahiwal coal-fired power plant in Sahiwal, Pakistan. (Xinhua/Li Hao)

A medical worker collects a swab sample from a man for nucleic acid test at Sahiwal coal-fired power plant in Sahiwal, Pakistan, Jan. 23, 2021. (Xinhua/Li Hao)

Photo taken on Jan. 26, 2021 shows a view of Sahiwal coal-fired power plant in Sahiwal, Pakistan. (Xinhua/Li Hao)

Engineers work in the central control room of Sahiwal coal-fired power plant in Sahiwal, Pakistan, Jan. 24, 2021. (Xinhua/Li Hao)

Photo taken on Jan. 25, 2021 shows a view of Sahiwal coal-fired power plant in Sahiwal, Pakistan. (Xinhua/Li Hao)

Technicians check the running status of equipment at Sahiwal coal-fired power plant in Sahiwal, Pakistan, Jan. 25, 2021. (Xinhua/Li Hao)