Ground staff work in the control tower at the Xiannyushan Airport in Chongqing, southwest China, Aug. 13, 2020. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua/Liu Chan)

A ground staff works in the control tower at the Xiannyushan Airport in Chongqing, southwest China, Aug. 13, 2020. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua/Liu Chan)

Photo taken with a mobile phone shows a flight inspection airplane from the Xiannyushan Airport at the Chongqing Jiangbei International Airport in Chongqing, southwest China, Aug. 13, 2020. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua)

Aerial photo taken on Aug. 12, 2020 shows the Xiannyushan Airport in Chongqing, southwest China. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 12, 2020 shows staff cleaning the runway a day ahead of official flight inspection at the Xiannyushan Airport in Chongqing, southwest China. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua/Liu Chan)

Aerial photo taken on Aug. 12, 2020 shows the Xiannyushan Airport in Chongqing, southwest China. Xiannyushan Airport in Wulong District of Chongqing has started flight inspection work on Thursday. The new airport, which began construction in April of 2018, features a 2,800-meter runway and a 6,000-square-meter terminal building. (Xinhua/Liu Chan)