Third Line Construction is a large -scale industrial migration process in China's economic history after the founding of New China，It is a strategic adjustment of gradually changing my country's productivity layout。The important strategic position in the Southwest region，Make it a key area for the construction of the third line of the country。The third -tier construction in the Southwest region focuses on the defense industry，Including metallurgical、Mechanical、Energy、Chemistry、Building materials and other industrial categories。Third -line construction has enhanced the industrial production capacity of the Southwest region，Improved industrial layout in the Southwest region，Lile the modern industrial foundation in the Southwest region。At the same time，Promoting the rise of a number of industrial towns in the Southwest region，The regional structure of the urban system in the Southwest region，Speed ​​up the development of some small and medium towns and collective towns in the Southwest region，Accelerate the urbanization process in the southwest region。

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Before the construction of the third line，The industrial foundation in the Southwest region is relatively weak，Especially Yunnan，Most of the steel required for all kinds of construction and industrial production rely on foreign supply。The national defense industry and machinery built for the defense industry built during the construction period of the third -tier construction period、Metallurgy、Chemistry、Energy and other industrial enterprises，greatly developing the industry in the southwest region。By the 1980s，40 industrial doors in the country，There are 39，There are about 160 major industrial industries in the country，Sichuan -Chongqing area accounts for 95%。Especially bet365 Play online games military industry enterprises，Military enterprises in Sichuan -Chongqing region account for 18%of national military enterprises。Third -line construction has increased the industrial production capacity of Guizhou Province。Compared with 1965，In 1976, the production capacity of raw coal in Guizhou Province increased by 6.1 times，Iron ore mining capacity increases by 7.6 times，Alkaline production capacity increases by 8.7 times，Chemical fertilizer production capacity increases by 2.9 times，Electric stone production capacity increases by 16.4 times。Three -line construction，Explore oil industry，The industrial category of Yunnan Province is basically complete，Basic coordination of the proportion of the weight industry。until 1984，Yunnan Light Industry output value is 5.192 billion yuan，accounting for 49.5%of all industrial output value，Heavy industrial output value is 5.305 billion yuan，accounting for 50.5%of the output value of the entire industrial。

Three -line construction，In the southwest region, a mechanical electronic industry、Metallurgical Industry、Mainly chemical industry and energy industry，The more complete modern industrial production system，built in Chongqing、Qujing's weapon industrial base，U.S. Chengdu、Guiyang、Anshun -centered Aviation Industry Base，Yi Jiangjin、Fuling、Wanxian -centered ship industry base，Chongqing、Guiyang、Kunming、Zigong、The mechanical industry base centered on Neijiang，Chongqing、Kunming、Yibin、Zigong、Chengdu -centered chemical industrial base，Ischang、Zunyi -centered Aerospace Industry Base，Yiyang、Duyong、Kaili、Qujing -centric electronic industrial base and steel industry base centered on Panzhihua。The formation of these industrial bases，Lile the modern industrial foundation of the Southwest region。

　Improve the industrial layout

Third -line construction enterprises in Sichuan -Chongqing area are in Chengdu、The two major central cities of Chongqing are axis heart，Follow bet365 Play online games Baocheng、Cheng Kun、Cheng Chong、Sichuan -Guizhou and Xiangyu Railway Line distribution，Fundamentally adjusted the industrial industry in Sichuan and Chongqing mainly relying on Chongqing、The spatial layout structure of the two major central cities in Chengdu，The industrial layout of the Sichuan -Chongqing area is relatively balanced。During the construction of the third line，In Kunming、Old、Dongchuan and other regions new metallurgy、Mechanical、Chemistry and other industrial enterprises，In Qujing、Xiaguan、Yuxi、New coal mining、Electricity、Machinery and other industrial enterprises，Improved the industrial layout of Yunnan Province，Let Yunnan Industry began to gradually develop from the east to the west，Three industrial distribution areas formed。is: an old、The southeast industrial distribution area centered on Kaiyuan City;、Dongchuan City -centric Industrial Distribution Area; Dali、The Western Industrial Distribution Area centered on Baoshan City。In Guizhou，Machinery built during the construction period of the third line、Electronic、Metallurgy、Nonferrous metal、Chemistry、Coal and other industrial enterprises，The industrial layout of Guizhou Province is centered on Guiyang City，Expand it to all parts of the province，Mainly formed Guiyang、Zunyi、Anshun、Duyong、Kaili、Six major industrial distribution areas centered on Liupanshui，Make Guizhou's industrial all over the railway line, which is radiated to the square。

From the overall perspective，Before the construction of the third line，my country's industrial partially collected in Shanghai、Tianjin、Qingdao、Wuxi and other provinces and cities。National Defense Industry, which is closely related to defense security，such as tank、Airplane、Artillery、Heavy weapons and equipment and ship production and nuclear weapons、Development of carrier rockets is mainly distributed in the Northeast、North China。Three -line construction，The strategic rear industrial base established in the Bet365 app download southwest region has changed the unreasonable layout status of the defense industry，It also changed my country's heavy industry concentrated in the northeast、The distribution pattern of North China and the southeast coast，It plays a role in balanced the national heavy industry layout。

　　Accelerate the urbanization process

Third -line construction has enhanced Chongqing、Kunming、Kunming、The economic strength of the four major central cities of Guiyang，Promoting the rise of a number of industrial towns in the Southwest region，Speed ​​up the development of some small and medium towns and collective towns in the Southwest region，Accelerate the urbanization process in the southwest region。Three -line construction，The focus of urban development in the Southwest region is from Chongqing、Kunming、Kunming、Guiyang expands to Zigong、Ferry、Luzhou、Deyang、Neijiang、Leshan、Mianyang、Yibin、Qu Jing、Yuxi、Zunyi、Kaili、Duyong、Anshun and other places，The regional structure of the urban system expands to a balanced direction，The scale structure of the urban system develops towards small and medium -sized directions。

Before the construction of the third line，In 1964, there were 8 construction cities in Sichuan -Chongqing area。where，Chongqing、Wanxian，Sichuan Nangchuan northern region has Zigong、Luzhou、Yibin、Neijiang、Nanchong，Only Chengdu。The number of cities and the urban population accounted for the proportion of the total number of non -agricultural population in the Sichuan -Chongqing region and the total number of non -agricultural population in the system: 25 % and 26.6 %，Sichuan Nanchuan north area is 62.5 % and 11.7 %，West Sichuan is 12.5 % and 17 %。until 1980，There are 13 construction cities in the Sichuan -Chongqing area，Da County，Northern Sichuan South Sichuan is still the original 5 cities，Chengdu、Mianyang、Leshan，New ferry in southwestern Sichuan、Xichang 2 City。The number of cities and the urban population accounted for the proportion of the total number of non -agricultural population in the Sichuan -Chongqing region and the total number of non -agricultural population in the town: 23 % and 22.6 %，The northern region of the Sichuan Nanchuan is 38.6 % and 12.2 %，West Sichuan is 23 % and 18.bet365 live casino games 7 %，Southwest Sichuan is 15.4 % and 5.0 %。Three -line construction，The regional structure of the urban system in Sichuan -Chongqing region has gradually developed towards a balanced direction。

Before the construction of the third line，There are 2 provinces in Yunnan Province (Kunming、Dongchuan) and two municipalities (old、River mouth)。until 1983，There are 6 cities in Yunnan Province，Including 2 provinces and cities (Kunming、Dongchuan) and 4 municipalities (old、Kaiyuan、Xiaguan、Zhaotong)。From 1964 to 1984，The number of cities across the country increased from 167 to 300，increase 79.6%，average annual growth rate of 3.98%，The number of cities in Yunnan here increases from 4 to 10，increase 150%，average annual growth rate of 7.5%，About 1.9 times the average annual growth rate of the country，Yunnan cities accounted for about 2.4%to 3.3%，increased 37.5%。Before the construction of the third line，Kunming in Yunnan Province、Dongchuan、Four cities of the old and estuary of Hekou are located in eastern Yunnan，West Yunnan None City。Three -line construction，until 1982，Dali in western Yunnan、Baoshan has built a city one after another。At the same time，Central Yunnan、Urban towns in southern Yunnan also developed increasingly in the construction of the third line。Third -line construction has changed the scattered point distribution mode of the urban and towns in Yunnan，Make the town expand along the main line of the railway。

Third Line Construction period，Anshun in Guizhou Province、Duyong、Six Panshui 3 construction cities，During this period, a total of 56 new cities in the country，Guizhou Province's newly established construction cities accounted for about 5.4%of the country。From the perspective of urban population，1965，Guizhou Province only has two construction cities in Guiyang and Zunyi, north of Guizhou，The proportion of urban population accounts for 37.7%and 6.3%。until 1980，Guizhou province's system city developed to 5，Guiyang、Anshun，Northern Guizhou has Zunyi，Southeast Guizhou has Duyong，Qianxi bet365 best casino games has six plates of water。The proportion of the number of cities and the total population of the city and the total number of non -agricultural population in the province: 40%and 27.7%，Northern Guizhou is 20%and 6.5%，Southeast Guizhou is 20%and 3.6%，Qianxi is 20%and 8.6%。Three -line construction，Qianxi、The urban development of southeast Guizhou is obviously faster than the middle of Qian、North Guizhou area，Promote the development of the regional structure of the town and towns and towns in Guizhou towards a balanced direction。

Future，Southwest region should take the third -tier construction enterprise as the focus of industrial structure when developing the economy。Third Line Construction Enterprise，Especially the military enterprises in it，The backbone of the manufacturing industry in China，With funding dense、Labor dense、Technical density and other characteristics，These companies should be encouraged to go out，Promoting it to become the main force of regional economic development。For three -line construction enterprises that have not been relocated in remote areas in the southwest，It should be supported from policy and funds，Fully tap the company's own potential，Give full play to its expansion in economic and technological、Radiation and guide functions，Therefore the economic development of the surrounding hinterland，Gradually advance the urbanization process of the region。

(This article is the National Social Science Foundation Project "Third Line Construction and the Research on Industrial Layout in Southwest Region" (19CZS073)、In 2022, Chongqing City's "Outstanding Middle -aged and Middle -aged Ideological and Political Theory Teacher Selection Project Project" (SZKZY 2022007) phased results)

(The author is a professor at Marxist College of Sichuan Foreign Studies University、Jialing Young Scholar、Researcher at Sichuan University Branch Center, Sichuan Foreign Languages ​​University Branch Center of Chongqing Chinese Characteristics System Research Center)