Workers work at the construction site for the expansion project of Kashgar International Airport in Kashgar, northwest China's Xinjiang Uygur Autonomous Region, Aug. 7, 2021. The expansion project of Kashgar International Airport is expected to be completed by the end of the year. (Xinhua/Gao Han)

A worker works at the construction site for the expansion project of Kashgar International Airport in Kashgar, northwest China's Xinjiang Uygur Autonomous Region, Aug. 7, 2021. The expansion project of Kashgar International Airport is expected to be completed by the end of the year. (Xinhua/Gao Han)

A worker works at the construction site for the expansion project of Kashgar International Airport in Kashgar, northwest China's Xinjiang Uygur Autonomous Region, Aug. 7, 2021. The expansion project of Kashgar International Airport is expected to be completed by the end of the year. (Xinhua/Gao Han)

Workers work at the construction site for the expansion project of Kashgar International Airport in Kashgar, northwest China's Xinjiang Uygur Autonomous Region, Aug. 7, 2021. The expansion project of Kashgar International Airport is expected to be completed by the end of the year. (Xinhua/Gao Han)