Concepts - Line 6 (Chengdu Metro): Line 6 (Chengdu Metro) is a metro line, opened on 18 December 2020. - Line 7 (Chengdu Metro): Line 7 (Chengdu Metro) is a loop metro line, opened on 6 December 2017, 38.61 km long. - Line 8 (Chengdu Metro): Line 8 (Chengdu Metro) is a metro line, opened on 18 December 2020. - Line 9 (Chengdu Metro): Line 9 (Chengdu Metro) is a metro line, opened on 18 December 2020. - Line 1 (Chongqing Rail Transit): Line 1 (Chongqing Rail Transit) is a metro line, opened on 28 July 2011, with 25 stations. - Line 10 (Chongqing Rail Transit): Line 10 (Chongqing Rail Transit) is a metro line, opened on 28 December 2017, with 27 stations. - Line 18 (Chongqing Rail Transit): Line 18 (Chongqing Rail Transit) is a metro line, opened on 28 December 2023, with 19 stations. - Line 2 (Chongqing Rail Transit): Line 2 (Chongqing Rail Transit) is a metro line, opened on 6 November 2004, with 25 stations. - Line 3 (Chongqing Rail Transit): Line 3 (Chongqing Rail Transit) is a metro line, opened on 29 September 2011, with 45 stations. - Line 4 (Chongqing Rail Transit): Line 4 (Chongqing Rail Transit) is a metro line, opened on 28 December 2018, with 33 stations. - Line 5 (Chongqing Rail Transit): Line 5 (Chongqing Rail Transit) is a metro line, opened on 28 December 2017. - Line 6 (Chongqing Rail Transit): Line 6 (Chongqing Rail Transit) is a metro line, opened on 28 September 2012. - Line 9 (Chongqing Rail Transit): Line 9 (Chongqing Rail Transit) is a metro line, opened on 25 January 2022, with 31 stations. - 重庆璧铜线: 重庆璧铜线是一条地铁线路，设有9座车站。 - International Expo branch: International Expo branch is a metro line. - Loop line (Chongqing Rail Transit): Loop line (Chongqing Rail Transit) is a loop metro line, opened on 28 December 2018, with 33 stations. - 重庆轨道交通江跳线: 重庆轨道交通江跳线是一条地铁线路，设有7座车站。 - 滁州地铁S4号线: 滁州地铁S4号线是一条地铁线路，设有14座车站。 - Cishibu (Han dynasty): Cishibu (Han dynasty): supervisory circuits set up under Emperor Wu of Han that later became the zhou (province) level. - Chengxuan buzhengshisi (Ming dynasty): Chengxuan buzhengshisi (Ming dynasty): provincial-level divisions of the Ming dynasty that replaced the xingsheng. - Zhili (Ming dynasty): Zhili (Ming dynasty): areas of prefectures directly administered by the capital in the Ming dynasty. - Provinces (Qing dynasty): Provinces (Qing dynasty): provincial-level divisions of the Qing dynasty. - Lu (Song dynasty): Lu (Song dynasty): the highest-level divisions above prefectures in the Song dynasty. - Dao (Tang dynasty): Dao (Tang dynasty): supervisory circuits above the prefectures in the Tang dynasty. - Xingsheng (Yuan dynasty): Xingsheng (Yuan dynasty): branch secretariats of the Yuan Central Secretariat and their territories, the origin of provinces. - Line 1 (Dalian Metro): Line 1 (Dalian Metro) is a metro line, opened on 30 October 2015, 28.34 km long, with 22 stations. - Line 12 (Dalian Metro): Line 12 (Dalian Metro) is a metro line, opened on 1 May 2014, 40.35 km long, with 8 stations. - Line 13 (Dalian Metro): Line 13 (Dalian Metro) is a metro line, opened on 28 December 2021, 43.15 km long, with 11 stations. - Line 2 (Dalian Metro): Line 2 (Dalian Metro) is a metro line, opened on 22 May 2015, 36.56 km long, with 29 stations. - Line 3 (Dalian Metro): Line 3 (Dalian Metro) is a metro line, opened on 1 May 2003, 49.15 km long, with 20 stations. - 大连地铁3号线支线: 大连地铁3号线支线是一条地铁线路，设有7座车站。 - Line 2 (Dongguan Rail Transit): Line 2 (Dongguan Rail Transit) is a metro line, opened on 27 May 2016, 37.8 km long, with 15 stations. - Line 2 (Foshan Metro): Line 2 (Foshan Metro) is a metro line, opened on 28 December 2021, 32.41 km long, with 17 stations. - Line 3 (Foshan Metro): Line 3 (Foshan Metro) is a metro line, opened on 28 December 2022, 40.72 km long, with 37 stations. - 佛山南海有轨电车1号线: 佛山南海有轨电车1号线是一条地铁线路，设有15座车站。 - Line 1 (Fuzhou Metro): Line 1 (Fuzhou Metro) is a metro line, opened on 18 May 2016, 24.89 km long, with 25 stations. - Line 2 (Fuzhou Metro): Line 2 (Fuzhou Metro) is a metro line, with 22 stations. - Line 4 (Fuzhou Metro): Line 4 (Fuzhou Metro) is a metro line, opened on 27 August 2023, with 23 stations. - Line 5 (Fuzhou Metro): Line 5 (Fuzhou Metro) is a metro line, with 20 stations. - Line 6 (Fuzhou Metro): Line 6 (Fuzhou Metro) is a metro line, opened on 28 August 2022, 31.35 km long, with 16 stations. - Line 1 (Guangzhou Metro): Line 1 (Guangzhou Metro) is a metro line, opened on 28 June 1997, 18.5 km long, with 16 stations. - Line 11 (Guangzhou Metro): Line 11 (Guangzhou Metro) is a loop metro line, opened on 28 December 2024. - Line 13 (Guangzhou Metro): Line 13 (Guangzhou Metro) is a metro line, opened on 28 December 2017, with 15 stations. - Line 14 (Guangzhou Metro): Line 14 (Guangzhou Metro) is a metro line, opened on 28 December 2017. - 广州地铁14号线支线: 广州地铁14号线支线是一条地铁线路，设有10座车站。 - Line 18 (Guangzhou Metro): Line 18 (Guangzhou Metro) is a metro line, opened on 28 September 2021, with 8 stations. - Line 2 (Guangzhou Metro): Line 2 (Guangzhou Metro) is a metro line, opened on 29 December 2002, 31.8 km long, with 24 stations. - Line 21 (Guangzhou Metro): Line 21 (Guangzhou Metro) is a metro line, opened on 28 December 2018, with 20 stations. - Line 22 (Guangzhou Metro): Line 22 (Guangzhou Metro) is a metro line, opened on 31 March 2022, 18.2 km long, with 8 stations. - Line 3 (Guangzhou Metro): Line 3 (Guangzhou Metro) is a metro line, opened on 26 December 2005, 68.53 km long. 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