At 8:30 PM last night, all the landscape lights at the bright Nanjing train station square, Zhifeng Building, Xinbai Department Store, and Dahangong Square were all turned off. The city instantly fell into darkness, with only functional lighting twinkling. From 8:30 to 9:30 PM last night, more than 400 buildings across the city turned off their lighting lamps. In just this one hour, the city saved 20,000 kWh of electricity.