includes 22 tunnels, totaling . A total of of the length is ballastless. According to Zhang Shuguang, then deputy chief designer of China's high-speed railway network, the designed continuous operating speed is , with a maximum speed of up to . The average commercial speed from Beijing to Shanghai was planned to be , which would have cut the train travel time from 10 hours to 4 hours. The rolling stock used on this line consists mainly of CRH380 trains. The CTCS-3 based train control system is used on the line, to allow for a maximum speed of of running and a minimum train interval of 3 minutes. With power consumption of 20 MW and capacity of about 1,050 passengers, the energy consumption per passenger from Beijing to Shanghai should be less than 80kWh. History China's two most important cities, Beijing and Shanghai, were not linked by rail until 1912, when the Jinpu railway was completed between Tianjin and Pukou. With the existing railway between Beijing and Tianjin, which was completed in 1900, the Huning railway between Nanjing and Shanghai opened in 1908, interrupted by a ferry between Pukou and Nanjing across the Yangtze River. A weekly Beijing–Shanghai direct train was first introduced in 1913. In 1933, a train ride from Beijing to Shanghai took around 44 hours, at an average speed of . Passengers had to get off in Pukou with their luggage, board a ferry named "Kuaijie" across the Yangtze, and get on another connecting train in Xiaguan on the other side of the river. In 1933, the Nanjing Train Ferry was opened for service. The new train ferry, "Changjiang" (Yangtze), built by a British company, was long, wide, was able to carry 21 freight cars or 12 passenger cars. Passengers could remain on the train when crossing the river, and the travel time was thus cut to around 36 hours. The train service was suspended during the Japanese invasion. In 1949, from Shanghai's North railway station toward Beijing (then Beiping) it took 36 hours, 50 minutes, at an average speed of . In 1956 the trip time was cut to 28 hours, 17 minutes. In the early 1960s, the travel time was further cut down to 23 hours, 39 minutes. In October 1968, the Nanjing Yangtze River Bridge was opened. The travel time was cut to 21 hours, 34 minutes. As new diesel locomotives were introduced in