China celebrated its National Day on September 26th with an amazing drone show. The event was called ‘City of Sky…Maybe Shenzhen.’ 10,000 drones flew over the air, making 3D patterns. They were all controlled by one computer. Earlier on October 3rd, more than 7,000 drones flew over the air. They formed pictures of dragons and tigers and could even change color. People who watched the show said that it presented China’s technological growth.