People view drones performance at the Orange Isle scenic area in Changsha, central China's Hunan Province, Aug. 16, 2018. (Photos: Xinhua)

Groups of drones performed a light show here to greet the Qixi festival, or Chinese Valentine's Day, which falls on Aug. 17 this year.

People view drones performance at the Orange Isle scenic area in Changsha, central China's Hunan Province, Aug. 16, 2018.

Groups of drones performed a light show here to greet the Qixi festival, or Chinese Valentine's Day, which falls on Aug. 17 this year.