# Concepts



- [Line 1 (Shenyang Metro)](/en/concepts/shenyang-metro-line-1.html)：Line 1 (Shenyang Metro) is a metro line, opened on 27 September 2010, 43.8 km long, with 32 stations.
- [Line 2 (Shenyang Metro)](/en/concepts/shenyang-metro-line-2.html)：Line 2 (Shenyang Metro) is a metro line, opened on 30 December 2011, with 33 stations.
- [Line 3 (Shenyang Metro)](/en/concepts/shenyang-metro-line-3.html)：Line 3 (Shenyang Metro) is a metro line, opened on 30 December 2024, 41.27 km long, with 27 stations.
- [Line 4 (Shenyang Metro)](/en/concepts/shenyang-metro-line-4.html)：Line 4 (Shenyang Metro) is a metro line, opened on 29 September 2023, 34.112 km long, with 23 stations.
- [Line 10 (Shenyang Metro)](/en/concepts/shenyang-metro-line-10.html)：Line 10 (Shenyang Metro) is a metro line, opened on 29 April 2020, with 21 stations.
- [Line 3 (Jinan Metro)](/en/concepts/jinan-metro-line-3.html)：Line 3 (Jinan Metro) is a metro line, opened on 28 December 2019, 21.59 km long, with 18 stations.
- [Line 2 (Hohhot Metro)](/en/concepts/hohhot-metro-line-2.html)：Line 2 (Hohhot Metro) is a metro line, opened on 1 October 2020, 27.31 km long, with 24 stations.
- [济南地铁6号线](/en/concepts/jinan-metro-line-6.html)：济南地铁6号线是济南城市轨道交通线路。
- [济南地铁4号线](/en/concepts/jinan-metro-line-4.html)：济南地铁4号线是济南城市轨道交通线路。
- [济南地铁8号线](/en/concepts/jinan-metro-line-8.html)：济南地铁8号线是济南城市轨道交通线路。
- [Line 2 (Chongqing Rail Transit)](/en/concepts/chongqing-metro-line-2.html)：Line 2 (Chongqing Rail Transit) is a metro line, opened on 6 November 2004, with 25 stations.
- [重庆轨道交通江跳线](/en/concepts/chongqing-metro-line-guidaojiaotongjiangtiaoxian.html)：重庆轨道交通江跳线是连接重庆中心城区和江津区的市郊铁路，2022年8月6日开通，并与重庆轨道交通5号线贯通运营。
- [Line 1 (Shijiazhuang Metro)](/en/concepts/shijiazhuang-metro-line-1.html)：Line 1 (Shijiazhuang Metro) is a metro line, opened on 26 June 2017, 34.3 km long, with 26 stations.
- [Line 2 (Shijiazhuang Metro)](/en/concepts/shijiazhuang-metro-line-2.html)：Line 2 (Shijiazhuang Metro) is a metro line, opened on 26 August 2020, 15.5 km long, with 15 stations.
- [Line 3 (Dalian Metro)](/en/concepts/dalian-metro-line-3.html)：Line 3 (Dalian Metro) is a metro line, opened on 1 May 2003, 49.15 km long, with 20 stations.
- [天津市域铁路津静线](/en/concepts/tianjin-jinjing-line.html)：津静线是天津中心城区与静海区间的市域铁路，首开段于2024年9月28日与地铁5号线贯通运营。
- [Line 1 (Dalian Metro)](/en/concepts/dalian-metro-line-1.html)：Line 1 (Dalian Metro) is a metro line, opened on 30 October 2015, 28.34 km long, with 22 stations.
- [Line 2 (Changchun Rail Transit)](/en/concepts/changchun-metro-line-2.html)：Line 2 (Changchun Rail Transit) is a metro line, opened on 30 August 2018, 34.7 km long, with 27 stations.
- [Line 13 (Beijing Subway)](/en/concepts/beijing-metro-line-13.html)：Line 13 (Beijing Subway) is a metro line, opened on 28 September 2002, 40.85 km long, with 17 stations.
- [Line 14 (Beijing Subway)](/en/concepts/beijing-metro-line-14.html)：Line 14 (Beijing Subway) is a metro line, opened on 5 May 2013, 47.3 km long, with 33 stations.
- [福州地铁滨海快线](/en/concepts/fuzhou-metro-binhai-express.html)：福州地铁滨海快线连接福州火车站与文岭，途经长乐国际机场，于2025年9月29日开始载客运营。
- [Line 15 (Beijing Subway)](/en/concepts/beijing-metro-line-15.html)：Line 15 (Beijing Subway) is a metro line, opened on 30 December 2010, 41.4 km long, with 20 stations.
- [Yizhuang line](/en/concepts/beijing-metro-line-ditieyizhuangxian.html)：Yizhuang line is a metro line, opened on 30 December 2010, 23.25 km long, with 14 stations.
- [Line 7 (Suzhou Metro)](/en/concepts/suzhou-metro-line-7.html)：Line 7 (Suzhou Metro) is a metro line, with 38 stations.
- [Line 2 (Fuzhou Metro)](/en/concepts/fuzhou-metro-line-2.html)：Line 2 (Fuzhou Metro) is a metro line, with 22 stations.
- [Line 2 (Tianjin Metro)](/en/concepts/tianjin-metro-line-2.html)：Line 2 (Tianjin Metro) is a metro line, opened on 1 July 2012, 27.157 km long, with 20 stations.
- [Line 6 (Tianjin Metro)](/en/concepts/tianjin-metro-line-6.html)：Line 6 (Tianjin Metro) is a metro line, opened on 6 August 2016, 43.6 km long, with 40 stations.
- [Capital Airport Express](/en/concepts/beijing-metro-line-shoudujichangxian.html)：Capital Airport Express is a metro line, opened on 19 July 2008, 30.0 km long, with 5 stations.
- [Line 4 (Fuzhou Metro)](/en/concepts/fuzhou-metro-line-4.html)：Line 4 (Fuzhou Metro) is a metro line, opened on 27 August 2023, with 23 stations.
- [Beijing Daxing International Airport Express](/en/concepts/beijing-metro-line-daxingguojijichangxian.html)：The Beijing Daxing International Airport Express connects Caoqiao with Beijing Daxing International Airport. It began initial operations in 2019 and has 3 stations.
- [香港机场快线](/en/concepts/hongkong-metro-line-jichangkuaixian.html)：香港机场快线是一条地铁线路，设有5座车站。
- [香港东铁线](/en/concepts/hongkong-metro-line-dongtiexian.html)：香港东铁线是港铁运营的铁路线路，连接金钟与罗湖、落马洲，并设赛马日使用的马场站。
- [Line 1 (Wuhu Rail Transit)](/en/concepts/wuhu-metro-line-1.html)：Line 1 (Wuhu Rail Transit) is a metro line, opened on 3 November 2021, 30.517 km long, with 25 stations.
- [Line 6 (Suzhou Metro)](/en/concepts/suzhou-metro-line-6.html)：Line 6 (Suzhou Metro) is a metro line, opened on 29 June 2024, with 30 stations.
- [Line 2 (Wuhu Rail Transit)](/en/concepts/wuhu-metro-line-2.html)：Line 2 (Wuhu Rail Transit) is a metro line, opened on 28 December 2021, 15.79 km long, with 11 stations.
- [香港南港岛线](/en/concepts/hongkong-metro-line-nangangdaoxian.html)：香港南港岛线是一条地铁线路，设有5座车站。
- [Line 2 (Dalian Metro)](/en/concepts/dalian-metro-line-2.html)：Line 2 (Dalian Metro) is a metro line, opened on 22 May 2015, 36.56 km long, with 29 stations.
- [香港东涌线](/en/concepts/hongkong-metro-line-dongyongxian.html)：香港东涌线是港铁运营的铁路线路，连接香港站与东涌站，现有8座车站。
- [香港港岛线](/en/concepts/hongkong-metro-line-gangdaoxian.html)：香港港岛线是港铁运营的铁路线路，连接坚尼地城站与柴湾站，现有17座车站。
- [京沪铁路](/en/concepts/beijing-shanghai-railway.html)：京沪铁路，又称京沪线，自北京站至上海站，全长1451.4公里，全线双线电气化，由京山线京津段、津浦线、沪宁线于2006年合并定名，是连接华北与华东的铁路大动脉。
- [Line 10 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-10.html)：Line 10 (Zhengzhou Metro) is a metro line, opened on 28 September 2023, with 12 stations.
- [京哈铁路](/en/concepts/beijing-harbin-railway.html)：京哈铁路自北京站至哈尔滨站，全长1249公里，为双线电气化国家I级干线，2006年由京秦铁路、秦沈客运专线、长大铁路沈长段与长滨铁路合并定名，是连接华北与东北的核心铁路通道。
- [Line 12 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-12.html)：Line 12 (Zhengzhou Metro) is a metro line, opened on 20 December 2023, with 11 stations.
- [Zhengxu line](/en/concepts/zhengzhou-metro-line-zhengxuxian.html)：Zhengxu line is a metro line, opened on 28 December 2023, with 26 stations.
- [香港荃湾线](/en/concepts/hongkong-metro-line-quanwanxian.html)：香港荃湾线是港铁运营的铁路线路，连接荃湾站与中环站，现有16座车站。
- [Line 2 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-2.html)：Line 2 (Zhengzhou Metro) is a metro line, opened on 19 August 2016, with 22 stations.
- [香港观塘线](/en/concepts/hongkong-metro-line-guantangxian.html)：香港观塘线是港铁运营的铁路线路，连接调景岭站与黄埔站，现有17座车站。
- [Line 1 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-1.html)：Line 1 (Zhengzhou Metro) is a metro line, opened on 28 December 2013, with 30 stations.
- [Line 3 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-3.html)：Line 3 (Zhengzhou Metro) is a metro line, opened on 26 December 2020, with 25 stations.
- [Line 4 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-4.html)：Line 4 (Zhengzhou Metro) is a metro line, opened on 26 December 2020, with 27 stations.

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