KUNMING - The China-Myanmar crude oil pipeline carried 3.87 million tons of crude oil into China last year, customs authorities in southwest China's Yunnan province said Friday.

Meanwhile, China imported 2.52 million tons of natural gas through a second pipeline linking the two countries, said Kunming Customs.

The value of oil and gas imports accounted for 23.4 percent of Yunnan's total imports in 2017, it said.

Crude oil started entering China via the 1,420-km China-Myanmar crude oil pipeline in mid-May of last year. The China-Myanmar natural gas pipeline was put into operation in July 2013.

The China-Myanmar oil and gas pipeline project is a state-operated collaboration between China, Myanmar and international commercial partners and built to help ensure the energy security of the world's second-largest economy.