Passengers queue to get aboard on the bullet train at the Mudanjiang Railway Station in Mudanjiang, northeast China's Heilongjiang Province, Dec. 25, 2018. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Zhang Chunxiang)
Passengers pose for photos with the bullet train at the Mudanjiang Railway Station in Mudanjiang, northeast China's Heilongjiang Province, Dec. 25, 2018. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Zhang Chunxiang)
A bullet train runs in the suburbs of Mudanjiang, northeast China's Heilongjiang Province on Dec. 25, 2015. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Zhang Chunxiang)
A bullet train runs in the suburbs of Mudanjiang, northeast China's Heilongjiang Province on Dec. 25, 2015. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Zhang Chunxiang)
The first bullet train of the Harbin-Mudanjiang high-speed rail line leaves Harbin Railway Station in Harbin, northeast China's Heilongjiang Province, Dec. 25, 2018. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Wang Jianwei)
The first bullet train of the Harbin-Mudanjiang high-speed rail line leaves Harbin Railway Station in Harbin, northeast China's Heilongjiang Province, Dec. 25, 2018. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Wang Jianwei)
The first bullet train of the Harbin-Mudanjiang high-speed rail line waits to leave Harbin Railway Station in Harbin, northeast China's Heilongjiang Province, Dec. 25, 2018. A high-speed railway line officially went into operation on Tuesday, linking cities of Harbin and Mudanjiang in China's northernmost province of Heilongjiang, where the temperatures dip as low as minus 40 degrees Celsius. (Xinhua/Wang Jianwei)