从20世纪六十年代中期开始,按照中央“立足于打仗,抢时间,改变布局,加快三线建设,首先是国防建设”的指示,国防工业按照规模小、专业化和协作的原则,全面展开“三线”战略后方的建设。到七十年代末,通过大规模的后方基地建设,改善了国防科技工业的战略布局,建成了一批大型的生产、科研战略后方基地,研制、生产出了一批部队急需的武器装备,对加强战备、巩固国防和发展内地经济、科技、文化等都具有重要意义。 Since the mid-1960s, according to the instructions of the Central Government on “basing ourselves on fighting, grabbing time, changing layout and speeding up the construction of the third line, we must first make our country’s national defense building”, the defense industry, in accordance with the principle of small scale, specialization and coordination, Expand “three lines ” strategy behind the building. By the end of the 1970s, the strategic rearrangement of the national defense science and technology industry was improved through the construction of a large-scale rear base and a number of large bases for rear production and research strategy were built up. A number of weapons and equipment urgently needed by the armed forces were developed and produced. Strengthening war preparedness and consolidating national defense and developing the economy, science and technology, and culture in the Mainland are of great significance.