RT Big Data Expo, China
A fleet of 500 drones lit up the night sky and flew in formation to create different shapes and numbers above #Guiyang’s Guanshanhu district on June 30, to celebrate the centenary of the founding of the Communist Party of China. #CPC100 [Video: Guanshanhu district media center]

https://twitter.com/BigData_China/status/1410487144011862017