Nanjing Eye Rainbow Runner is 3.4 kilometers long, with more than 5,000 people exercising every day. From the starting point to the end point, black technology on the runway is everywhere.

Before exercise, citizens can recognize faces on the smart big screen and look directly at the big screen camera for 5- 10 seconds. The system will automatically recognize faces and start recording motion information. Trail * * * is equipped with 9 smart devices, which can grasp the distance, duration, pace, energy consumption and ranking of citizens in real time. Citizens can know how many kilometers they have run without carrying a mobile phone, and truly realize "traveling lightly".