Core Insights - Chongqing has rapidly developed into one of the two major metropolises in Southwest China within a century, significantly influenced by key historical events such as the opening of ports, its status as a wartime capital, and its designation as a center for the Third Front construction [1][3]. Group 1: Historical Context - The Third Front construction, initiated in 1964, involved the designation of regions based on their distance from borders, with Chongqing selected as a core city and military industrial base [1]. - From 1964 to 1980, the Third Front construction led to the establishment of 118 enterprises and research institutions in Chongqing, forming a defense industrial system that included conventional weapons manufacturing and sectors like electronics, shipbuilding, aerospace, and nuclear industry [1][3]. Group 2: Reasons for Selection - Five main reasons contributed to Chongqing's selection as the center for Third Front construction: 1. Abundant resources and a large population in Sichuan, with Chongqing as a strategic location [3]. 2. A strong foundation in weapon manufacturing due to the relocation of coastal factories during the war [3]. 3. The presence of major industrial bases for heavy steel and special steel, supporting heavy industry [3]. 4. A solid foundation in machinery and chemical industries, enhancing overall manufacturing capabilities [3]. 5. Rich coal resources and the largest thermal power plant in Southwest China at the time, ensuring reliable energy for large-scale production [3]. Group 3: Economic Impact - The Third Front construction served as a crucial industrial and economic boost for Chongqing, transitioning its key industries towards the automotive sector over time [5]. - The production of the first microcar, the Chang'an SC110, in November 1984 marked a significant milestone, establishing a connection between defense technology and subsequent civilian industries [5].