Photo taken on Dec. 1, 2020 shows a drone formation ready for testing at Tianjin EFY Technology Co., Ltd. in north China's Tianjin Municipality. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Employees check a drone at an aviation technology company in north China's Tianjin Municipality, Dec. 3, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Photo taken on Dec. 1, 2020 shows a drone at the Tianjin EFY Technology Co., Ltd. in north China's Tianjin Municipality. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

An employee assembles a drone at the Tianjin Holly Jet Co., Ltd. in north China's Tianjin Municipality, Dec. 3, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Employees from an aviation technology company check a drone in north China's Tianjin Municipality, Dec. 3, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Employees assemble drones at the Tianjin i-Kingtec Co., Ltd. in north China's Tianjin Municipality, Dec. 1, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Photo taken on Dec. 1, 2020 shows an industrial drone made by the Tianjin i-Kingtec Co., Ltd. in north China's Tianjin Municipality. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

Employees test a drone at the Tianjin i-Kingtec Co., Ltd. in north China's Tianjin Municipality, Dec. 1, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)

An employee prepares a drone for test fly at Tianjin i-Kingtec Co., Ltd. in north China's Tianjin Municipality, Dec. 1, 2020. The Binhai New Area in Tianjin has been actively boosting the development of drone industry in recent years by encouraging innovations among local companies. The district has built up a complete industrial chain of drone research, development, production and testing. (Xinhua/Zhao Zishuo)