"China Encourages Express Railway Transportation" More than 20 railwaytransportation lines totaling some 2,000 kilometers are planned for a dozen Chinese cities, said officials with the Ministryof Construction. Railway transportation includes urban express railways, subways, light rails, and trolley cars. Beijing,Shanghai, Chongq郑州癫痫哪治得好，医院选择要慎重ing, Wuhan, and Changchun are all planning to build such a network to conquer the traffic jams and seriouspollution caused by the rapid increase of the urban population and the number of automobiles in China. The network will havethe advantages of cleanliness, security, punctuality, high speed, and large transport capacity, said the天津哪家医院治疗癫痫效果好 officials. Financialand technological factors have hampered the development of such a system over the past three decades, and there are now onlyabout 90 km of underground lines in the country with some 600 subway trains in use. Now, however, Beijing alone is planningto build a railway system composed of 13 main routes and two exten癫痫睡觉时发作的前兆sions lines totaling 408 km, and increase the railwaytransport proportion to 50 percent from the present 15 percent, according to local officials. China's first urban railwayline was in Beijing and began test operations in October 1969, and the second, in Tianjin, was open to traffic in December1984.