China's first shale gas field Fuling, with an annual capacity of 10 billion cubic meters, has become the world's second largest next to North America.

This marks the entry of China's shale gas development into a large-scale commercialization stage and is of great significance to the country's energy structure adjustment, relieving pressure on the supply of natural gas in central and eastern China.

It can also help to speed up energy savings and emission reduction as well as air pollution prevention and control.