In the later stage of the Liberation War, with the victory of the three major battles over, the Central Committee of the Communist Party of China and Chairman Mao Zedong made strategic decisions, ordering Liu Bocheng (played by Fu Xuecheng) and Deng Xiaoping (played by Lu Qi) to lead a group of the Second Field and Fourth Field to advance towards Hunan, Hubei, Guizhou, and Sichuan, and annihilate the remaining enemies in the southwest. On his way south, Deng Xiaoping asked railway experts he met about the construction of the Chengdu Chongqing Railway and gave political education classes to the troops heading south in a timely manner, implementing Chairman Mao's great teachings of "carrying out the revolution to the end"...

In the Korean War China and North Korea fought together against the United States. Frontline needs in tens of thousands tons of military supplies every day. Railways has become the most important means of transport. The U.S. Army, unwilling to accept defeat on the battlefield, mobilized a large number of aircraft to bomb indiscriminately along railways, and carried out the so-called "war of attrition". Following the order of Commander Peng Dehuai, Liang Junying, the commander of the Sino-DPRK Joint Railway Transport Command, led the volunteer warriors on the transport front to carry forward the fearless revolutionary spirit, building bridges, repairing railways, and transporting supplies in the "317" section, which was dotted with bombs and mines. This is the real "indestructible and bombable steel transport line".