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When did Beijing connect the natural gas pipeline?

Beijing 1997 natural gas pipeline. During the period of 1997, the first line from Shaanxi-Gansu-Ningxia gas field to Beijing was completed. With the Shaanxi-Gansu-Ningxia natural gas entering Beijing, the long-term shortage of natural gas sources in Beijing has been completely changed, and the supply capacity has been rapidly improved, which has opened an era of rapid development of natural gas.