No trespassing. Traffic lights are traffic lights, most of which are located at the intersections of cities. A red light means stop, and a green light means move forward. The traffic lights at the entrance of Tieqi Brigade in Chang 'an Town, Dongguan should not be broken. Chang 'an Town belongs to Dongguan City, Guangdong Province. It is located at the southern end of Dongguan City, bordering Shenzhen City in the east, the Pearl River Estuary in the south and Humen Port in the west.