URUMQI -- Railway authorities in China's far western Xinjiang region on Wednesday launched a cargo train service linking its regional capital of Urumqi with Moscow.

The one more cargo train service westward can help boost the development of the northwestern autonomous region, a "core area" of the Silk Road economic belt, said Liu Jianxin, vice governor of Xinjiang, at the launch ceremony.

Since March 2014, Xinjiang has opened cargo train service to Kazakhstan, Georgia, Iran, Turkey and also Chelyabinsk of Russia.

The first train, loaded with 1,300 tonnes of PVC, left Urumqi at 6:15 pm and is scheduled to reach Moscow more than 4,000 km away in about ten days. It will return with wood pulp from Russia.

Wang Hongxin, chairman of Xinjiang Zhongtai Chemical Co., Ltd., said the cargo service can help drive the company's annual sales of PVC by 10 percent.

By the second half of the year, more than three cargo trains will run between Xinjiang and the destinations in Russia and also central and western Asia per week.

The trains can then transport 50 billion yuan ($8.1 billion) of cargo a year, Liu said.