The construction of the third line involves the southwest third line, the northwest third line and the south-central third line, with the focus on the southwest third line areas such as Sichuan, Guizhou and Yunnan. Project investment accounts for one-third of the national third-line construction, of which Sichuan accounts for one-fourth of the national total.
1964, the central government made a major strategic decision to build the third line. The third line divides the national territory into three parts according to the distance from the border defense and coastal defense.
In terms of administrative divisions, the third-tier areas basically include seven provinces and regions belonging to the mainland, such as Sichuan (including Chongqing), Yunnan, Guizhou, Shaanxi, Qinghai, Gansu and Ningxia, as well as some provinces and regions close to the mainland, such as Shanxi, Hebei, Henan, Hunan, Hubei and Guangxi. The third line involves more than 10 provinces and regions, and the nearest to the coastline is more than 700 kilometers, and it is thousands of kilometers away from the western border.
Starting from 1965, China began to relocate some coastal industrial enterprises to the western and northwest regions, and most of the newly started projects were concentrated in the western region.
The construction of the third line, with a national investment of more than 200 billion and a manpower of one million, lasted more than 10 years, and a number of large and medium-sized factories, railways, hydropower stations and other infrastructure and scientific research institutes were built in southwest and northwest provinces.
In the middle and late 1980s, in the main battlefield of the third-line construction represented by Panzhihua, the summary and spiritual refinement of development and construction began.
1984 On February 9th, in the theme report of "Love Panzhihua and Build a New Ferry Together" at the first model worker commendation meeting in Panzhihua City, the great achievements of Panzhihua's spiritual civilization construction were comprehensively summarized for the first time, which summarized five aspects: hard work, selfless dedication, pioneering and enterprising, unity and cooperation, and scientific truth-seeking, and was explicitly called "Panzhihua spirit" by the government.
Liupanshui City put forward the "Liupanshui Spirit" in the new period of promoting dedication, tolerance, innovation and transcendence.
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Through the third-line construction, China has built a large number of industrial and transportation infrastructure in the western region, supplemented a large number of scientific and technological forces, improved the productivity level of the western region, and successively built a number of important railway, highway trunk lines and branch lines. A large number of backbone enterprises and bases in machinery industry, energy industry and raw material industry have been built, which have become the industrial pillars in the western region. In addition, China has also built a number of new industrial cities in the western region.
The investment of a large number of funds, scientific and technological personnel and industrial facilities, the opening of railways, highways, posts and telecommunications, the development of mineral resources, and the inward migration of scientific research institutions and universities have brought rare development opportunities to the western region. The rise of a number of new industrial cities in the border areas has promoted the development and prosperity of economy, culture and social life in the western region.
References:
People's Network-Third-line Spirit-No matter how hard and tired you are, no one will shout hard and tired.
Baidu encyclopedia-three-line spirit