建国以来，我国铁路运输取得很大成就。在保证国民经济建设和政治、军事、人民物质文化生活需要方面发挥了应有作用，在仅有五万多公里的营业线路上，在机车车辆不足的困难条件下，年换算周转量由八百多亿吨公里发展到八千多亿吨公里，我国铁路运输密度列世界第二位。车辆运用效率名列世界前茅。累计运输收入二千 Since the founding of New China, great achievements have been made in railway transportation. It has played its due role in ensuring the construction of the national economy and the needs of the political, military and people’s material and cultural life. On the operating lines of only over 50,000 kilometers, under the difficult conditions of lack of rolling stock, the annual conversion amount of turnover is increased from 800 The development of more than 800 million tons of kilometers has reached over 800 billion tons of kilometers. China ranks second in terms of railway transport density in the world. Vehicle efficiency among the best in the world. Cumulative transport income two thousand