Cooks are preparing food in a dining car of the tourist train from Harbin to Heihe, northeastern China's Helongjiang Province, on May 31, 2016. To meet the needs of tourists, the railway administration of Heilongjiang opened a new tourist line from Harbin to Heihe and invited some people to experience the line on Tuesday. (Xinhua/Wang Song)

A conductor makes the bed in a carriage of tourist train from Harbin to Heihe, northeast China's Helongjiang Province, May 31, 2016. To meet the needs of tourists, the railway administraion of Heilongjiang opened a new tourist line from Harbin to Heihe and invited some people to experience the line on Tuesday. (Xinhua/Wang Song)

A conductor shows Karaoke equipment in a carriage of tourist train from Harbin to Heihe, northeast China's Helongjiang Province, May 31, 2016. To meet the needs of tourists, the railway administraion of Heilongjiang opened a new tourist line from Harbin to Heihe and invited some people to experience the line on Tuesday. (Xinhua/Wang Song)

Passengers play cards in a carriage of tourist train from Harbin to Heihe, northeast China's Helongjiang Province, May 31, 2016. To meet the needs of tourists, the railway administraion of Heilongjiang opened a new tourist line from Harbin to Heihe and invited some people to experience the line on Tuesday. (Xinhua/Wang Song)

Photo taken on May 31, 2106 shows a plate of direction on a carriage of tourist train from Harbin to Heihe, northeast China's Helongjiang Province. To meet the needs of tourists, the railway administraion of Heilongjiang opened a new tourist line from Harbin to Heihe and invited some people to experience the line on Tuesday. (Xinhua/Wang Song)Source: Xinhua