Workers are busy at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

A worker recieves temperature check at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

Workers are busy at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

A worker disinfects at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

Workers are busy at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

A worker disinfects at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)

Workers are busy at the construction site in Lhasa Gongga Airport in Lhasa, capital of southwest China`s Tibet Autonomous Region, March 15, 2020. The reconstruction and expansion project of Lhasa Gongga Airport was fully resumed on Sunday under prevention measures against the novel coronavirus. (Xinhua/Zhan Yan)