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The National Emission Standard I was introduced in 1999 and the National Emission Standard II followed in 2004.
CNPC is China's largest oil and gas producer and supplier, as well as one of the world's major oilfield service providers.
He performed eagle hunting to over 10,000 visitors at an ice and snow festival on Jan. 10 in Qinghe County, in the northeast of Xinjiang Uygur Autonomous Region, along the Chinese border with Mongolia.
He asked governments at all levels to promote thrift and continue to cut taxes and fees, calling for better supervision and management of major outbound investment projects.
Xi also invited Trump to pay a state visit to China in 2017.
来源：资阳报