The opening ceremony of BJL4 was held at the National Library Station at 9:00 a.m. September 28, 2009. Secretary of the Beijing Municipal Committee of the Communist Party of China Mr. Liu Qi, Mayor of Beijing Mr. Guo Jin Long, Vice Secretary Mr. Wang An Shun, Vice Mayor Mr. Ji Lin, Mr. Huang Wei, Mr. Chen Gang and other officials as well as Secretary for Transport and Housing of HKSAR Ms Eva Cheng witnessed the ceremony. Participants also include representatives of the owners, the construction contractors, and shareholders of BJL4, BMOC, cooperation partners and residents along the line.
The ceremony is hosted by Vice Mayor Mr. Chen Gang. Representatives of the construction contractors, operator and residents spoke at the ceremony. On behalf of the government, Mayor Guo Jin Long expressed his congratulations. He stressed that BJL4 is the second North-South transportation artery in Beijing and it is also the first metro line constructed and operated with PPP mode. The opening of BJL4 will definitely improve the public transportation condition in Beijing. At the end of the ceremony, Mr. Liu Qi gave the instruction to the first train of BJL4 and expressed sincere gratitude to all the people involved in the construction of this line.
After the ceremony, officials and the participants ride the train at BJL4. The line is opened to public at 2:30 pm on September 28, 2009.