The picture shows that visitors wait for a green light to walk into the Tian'anmen Square in Beijing August 2, 2004.

To ensure the safety of pedestrians and save energy, the city authorities have installed the first solar energy traffic light at a pedestrian walk to the square, at the east side and pedestrians could push the button for a green light.

This solar light system could store electricity for a 24-hour use.

(People's Daily August 3, 2004)