Two sets of Fuxing bullet trains will serve China's northernmost province, Heilongjiang, as the peak of the annual Spring Festival travel rush arrives, China Railway Harbin Group said.

The trains — the most freeze-resistant and intelligent model of the Fuxing family so far — arrived Harbin on Monday and will run high-speed routes connecting Harbin to other cities in the province, including Qiqihar, Mudanjiang and Jiamusi after a series of tests and no-load trials.

The trains are the first of their type to run at the highest altitude and coldest region in China.