Chinese President Hu Jintao (front) tries an automatic ticket machine in a subway station in central Beijing Oct. 7, 2009. Hu made a tour in the Chinese capital to inspect the city's order in such sectors as public security, traffic and tourism during the National Day holidays. [Xinhua]

Chinese President Hu Jintao (L, front) shakes hands with volunteers who help serve the tourists in the Summer Palace in Beijing Oct. 7, 2009. Hu made a tour in the Chinese capital to inspect the city's order in such sectors as public security, traffic and tourism during the National Day holidays. [Xinhua]

Related Video of Subway Line 4:
New Subway line to accelerate Beijing life
Subway Line 4 starts operation in Beijing