Passengers take a new CJ6 train heading for Changsha from Zhuzhou South Railway Station in Zhuzhou, central China's Hunan Province, Dec. 24, 2019. A new model of high-speed trains designed for inter-city transportation was put into operation Tuesday in Hunan. With a design speed of 160 kph, the CJ6 trains were jointly developed by an inter-city railway company in Hunan and CRRC Zhuzhou Locomotive Co., Ltd.. (Xinhua/Chen Zhenhai)

Passengers wait to take a new CJ6 train at Zhuzhou South Railway Station in Zhuzhou, central China's Hunan Province, Dec. 24, 2019. A new model of high-speed trains designed for inter-city transportation was put into operation Tuesday in Hunan. With a design speed of 160 kph, the CJ6 trains were jointly developed by an inter-city railway company in Hunan and CRRC Zhuzhou Locomotive Co., Ltd.. (Xinhua/Chen Zhenhai)

Photo taken on Dec. 24, 2019 shows a new CJ6 train at Zhuzhou South Railway Station in Zhuzhou, central China's Hunan Province. A new model of high-speed trains designed for inter-city transportation was put into operation Tuesday in Hunan. With a design speed of 160 kph, the CJ6 trains were jointly developed by an inter-city railway company in Hunan and CRRC Zhuzhou Locomotive Co., Ltd.. (Xinhua/Chen Zhenhai)

A passenger takes a new CJ6 train to Changsha from Zhuzhou South Railway Station in Zhuzhou, central China's Hunan Province, Dec. 24, 2019. A new model of high-speed trains designed for inter-city transportation was put into operation Tuesday in Hunan. With a design speed of 160 kph, the CJ6 trains were jointly developed by an inter-city railway company in Hunan and CRRC Zhuzhou Locomotive Co., Ltd.. (Xinhua/Chen Zhenhai)