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"For CNPC, as well as other oil and gas companies, China's increasing appetite for natural gas provides an alluring new growth momentum, when oil consumption growth has slowed down," said Lin Boqiang, head of the China Institute for Studies in Energy Policy at Xiamen University.

"Growing salaries of women professionals have changed their perceptions about marriage," he added. "More women have come to realize the importance of having their own place and gaining independence."

"From design and processing to equipment, there is a long industrial chain around chips that requires a rather significant accumulation of experience," he said.

"For the present, it is better to focus tobacco control on traditional cigarettes, rather than e-cigarettes," he said.

"Green development of the energy sector has played an important role in reducing carbon emissions," the white paper said.