A worker with the Lanzhou Railway Bureau examines a Hexie 3D electric locomotive before it is put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)

A worker with the Lanzhou Railway Bureau examines a Hexie 3D electric locomotive before it is put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)

Workers with the Lanzhou Railway Bureau examine Hexie 3D electric locomotives before they are put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)

A worker with the Lanzhou Railway Bureau examines a Hexie 3D electric locomotive before it is put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)

Workers with the Lanzhou Railway Bureau test a Hexie 3D electric locomotive before it is put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)

A worker with the Lanzhou Railway Bureau examines a Hexie 3D electric locomotive before it is put to use in Lanzhou, capital of northwest China's Gansu Province, Jan. 24, 2014. The Hexie 3D electric locomotive can transport 3,000 passengers at a maximum speed of 160 kilometers per hour. It is the latest model of the Hexie class electric locomotives. Dalian Locomotive and Rolling Stock Co., Ltd. CNR Group, the manufacturer, has already provided 40 Hexie 3D locomotives to the railway system for use during the "Chunyun", a 40-day Spring Festival travel rush period starting from Jan. 16 this year. (Xinhua/Nie Jianjiang)