A staff member checks a China-Europe freight train in Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, Feb. 7, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)

A staff member directs operation of containers in Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, Feb. 7, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)

Staff members disinfect containers in Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, Feb. 7, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)

A China-Europe freight train pulls out of Alataw Pass in northwest China's Xinjiang Uygur Autonomous Region, Feb. 7, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)

A container is hoisted in Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, Feb. 7, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)

Staff members perform random sample check on products loaded by China-Europe freight trains in Alataw Pass, northwest China's Xinjiang Uygur Autonomous Region, Feb. 6, 2021. The number of China-Europe freight trains traveling through Alataw Pass, a major land port in northwest China, reached 444 in January, up by 49.5 percent year on year. (Xinhua/Ma Kai)