# knowledge

Read people, places, events, organizations, works, and concepts through sourced relations.

- [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.
- [北京市人民政府关于空气重污染期间采取临时交通管理措施的通告](/en/works/beijing-government-notice-2013-10.html)：京政发〔2013〕35号规定，空气重污染红色预警期间实行机动车单双号通行、扬尘载货车辆停驶，并暂停本市工作日高峰时段尾号轮换限行。
- [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.
- [Line 5 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-5.html)：Line 5 (Zhengzhou Metro) is a loop metro line, opened on 20 May 2019, with 32 stations.
- [Line 6 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-6.html)：Line 6 (Zhengzhou Metro) is a metro line, opened on 30 September 2022, with 28 stations.
- [Line 4 (Suzhou Metro)](/en/concepts/suzhou-metro-line-4.html)：Line 4 (Suzhou Metro) is a metro line, opened on 15 April 2017, with 31 stations.
- [Chengjiao line](/en/concepts/zhengzhou-metro-line-chengjiaoxian.html)：Chengjiao line is a metro line, opened on 12 January 2017, 31.7 km long, with 19 stations.
- [北京市人民政府关于空气重污染橙色红色预警期间禁止燃放烟花爆竹的通告](/en/works/beijing-government-notice-2014-02.html)：京政发〔2014〕4号规定，空气重污染一级（红色）或二级（橙色）预警期间，北京市全天禁止燃放烟花爆竹，并暂停批发配送及零售销售。
- [香港屯马线](/en/concepts/hongkong-metro-line-tunmaxian.html)：香港屯马线是港铁运营的铁路线路，连接屯门站与乌溪沙站，现有27座车站。
- [香港将军澳线](/en/concepts/hongkong-metro-line-jiangjunaoxian.html)：香港将军澳线是港铁运营的铁路线路，连接北角、宝琳及康城，现有8座车站。
- [Line 1 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-1.html)：Line 1 (Hangzhou Metro) is a metro line, opened on 24 November 2012, 53.6 km long, with 33 stations.
- [郑州地铁7号线](/en/concepts/zhengzhou-metro-line-7.html)：郑州地铁7号线一期于2024年12月29日开通运营。
- [郑州地铁8号线](/en/concepts/zhengzhou-metro-line-8.html)：郑州地铁8号线一期于2024年12月29日开通运营。
- [Line 14 (Zhengzhou Metro)](/en/concepts/zhengzhou-metro-line-14.html)：Line 14 (Zhengzhou Metro) is a metro line, opened on 19 September 2019, with 6 stations.
- [Line 2 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-2.html)：Line 2 (Hangzhou Metro) is a metro line, opened on 24 November 2014, 43.3 km long, with 33 stations.
- [Line 1 (Xi'an Metro)](/en/concepts/xian-metro-line-1.html)：Line 1 (Xi'an Metro) is a metro line, opened on 15 September 2013.
- [Line 2 (Xi'an Metro)](/en/concepts/xian-metro-line-2.html)：Line 2 (Xi'an Metro) is a metro line, opened on 16 September 2011, with 25 stations.
- [Line 3 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-3.html)：Line 3 (Hangzhou Metro) is a metro line, opened on 21 February 2022, with 37 stations.
- [Line 3 (Xi'an Metro)](/en/concepts/xian-metro-line-3.html)：Line 3 (Xi'an Metro) is a metro line, opened on 8 November 2016, with 26 stations.
- [Line 4 (Xi'an Metro)](/en/concepts/xian-metro-line-4.html)：Line 4 (Xi'an Metro) is a metro line, with 29 stations.
- [Line 5 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-5.html)：Line 5 (Hangzhou Metro) is a metro line, opened on 24 June 2019, 56.8 km long, with 40 stations.
- [Line 6 (Xi'an Metro)](/en/concepts/xian-metro-line-6.html)：Line 6 (Xi'an Metro) is a metro line, opened on 28 December 2020, with 32 stations.
- [Line 6 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-6.html)：Line 6 (Hangzhou Metro) is a metro line, opened on 30 December 2020, 58.8 km long, with 33 stations.
- [西安地铁8号线](/en/concepts/xian-metro-line-8.html)：西安地铁8号（环）线是西安首条地铁环线，2024年12月26日开通运行，线路长约50公里，设37座车站。
- [Line 10 (Xi'an Metro)](/en/concepts/xian-metro-line-10.html)：Line 10 (Xi'an Metro) is a metro line, opened on 26 September 2024, with 17 stations.
- [Line 9 (Xi'an Metro)](/en/concepts/xian-metro-line-9.html)：Line 9 (Xi'an Metro) is a metro line, opened on 28 December 2020, with 15 stations.
- [Line 7 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-7.html)：Line 7 (Hangzhou Metro) is a metro line, opened on 30 December 2020, with 24 stations.
- [Line 9 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-9.html)：Line 9 (Hangzhou Metro) is a metro line, opened on 24 November 2012, 29.45 km long, with 21 stations.
- [Line 6 (Guangzhou Metro)](/en/concepts/guangzhou-metro-line-6.html)：Line 6 (Guangzhou Metro) is a metro line, opened on 28 December 2013, 41.7 km long, with 32 stations.
- [Line 5 (Xi'an Metro)](/en/concepts/xian-metro-line-5.html)：Line 5 (Xi'an Metro) is a metro line, with 34 stations.
- [Line 14 (Xi'an Metro)](/en/concepts/xian-metro-line-14.html)：Line 14 (Xi'an Metro) is a metro line, opened on 29 June 2021, with 18 stations.
- [Line 16 (Xi'an Metro)](/en/concepts/xian-metro-line-16.html)：Line 16 (Xi'an Metro) is a metro line, opened on 27 June 2023, with 9 stations.
- [Line 10 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-10.html)：Line 10 (Hangzhou Metro) is a metro line, opened on 21 February 2022, with 12 stations.
- [Line 16 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-16.html)：Line 16 (Hangzhou Metro) is a metro line, opened on 23 April 2020, 35.12 km long, with 12 stations.
- [Line 19 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-19.html)：Line 19 (Hangzhou Metro) is a metro line, opened on 22 September 2022, 59 km long, with 18 stations.
- [Line 1 (Harbin Metro)](/en/concepts/harbin-metro-line-1.html)：Line 1 (Harbin Metro) is a metro line, opened on 26 September 2013, 26.3 km long, with 23 stations.
- [Line 2 (Harbin Metro)](/en/concepts/harbin-metro-line-2.html)：Line 2 (Harbin Metro) is a metro line, opened on 19 September 2021, 28.19 km long, with 19 stations.
- [Line 3 (Harbin Metro)](/en/concepts/harbin-metro-line-3.html)：Line 3 (Harbin Metro) is a loop metro line, opened on 26 January 2017, 37.6 km long, with 36 stations.
- [Line 4 (Hangzhou Metro)](/en/concepts/hangzhou-metro-line-4.html)：Line 4 (Hangzhou Metro) is a metro line, opened on 2 February 2015, 20.8 km long, with 33 stations.
- [杭州杭海城际铁路](/en/concepts/hangzhou-metro-line-hanghaichengjitielu.html)：杭海城际铁路连接临平南高铁站与浙大国际校区站，2021年6月28日开通初期运营。
- [Line 1 (Nanjing Metro)](/en/concepts/nanjing-metro-line-1.html)：Line 1 (Nanjing Metro) is a metro line, opened on 3 September 2005, with 32 stations.
- [Line 2 (Nanjing Metro)](/en/concepts/nanjing-metro-line-2.html)：Line 2 (Nanjing Metro) is a metro line, opened on 28 May 2010, with 30 stations.
- [Line 1 (Lanzhou Metro)](/en/concepts/lanzhou-metro-line-1.html)：Line 1 (Lanzhou Metro) is a metro line, opened on 23 June 2019, with 24 stations.
- [Line 5 (Nanjing Metro)](/en/concepts/nanjing-metro-line-5.html)：Line 5 (Nanjing Metro) is a metro line, opened on 31 March 2024, with 30 stations.
- [Line 2 (Lanzhou Metro)](/en/concepts/lanzhou-metro-line-2.html)：Line 2 (Lanzhou Metro) is a metro line, opened on 29 June 2023, with 9 stations.
- [Line 4 (Nanjing Metro)](/en/concepts/nanjing-metro-line-4.html)：Line 4 (Nanjing Metro) is a metro line, opened on 18 January 2017, with 18 stations.
- [Line 3 (Nanjing Metro)](/en/concepts/nanjing-metro-line-3.html)：Line 3 (Nanjing Metro) is a metro line, opened on 1 April 2015, with 31 stations.
- [Line 1 (Ningbo Rail Transit)](/en/concepts/ningbo-metro-line-1.html)：Line 1 (Ningbo Rail Transit) is a metro line, opened on 30 May 2014, with 29 stations.
- [Line 3 (Ningbo Rail Transit)](/en/concepts/ningbo-metro-line-3.html)：Line 3 (Ningbo Rail Transit) is a metro line, opened on 30 June 2019.
- [Line 4 (Ningbo Rail Transit)](/en/concepts/ningbo-metro-line-4.html)：Line 4 (Ningbo Rail Transit) is a metro line, opened on 23 December 2020, with 27 stations.
- [Line 5 (Ningbo Rail Transit)](/en/concepts/ningbo-metro-line-5.html)：Line 5 (Ningbo Rail Transit) is a metro line, opened on 28 December 2021.
- [Line 10 (Nanjing Metro)](/en/concepts/nanjing-metro-line-10.html)：Line 10 (Nanjing Metro) is a metro line, opened on 1 July 2014, with 24 stations.
- [Line 7 (Nanjing Metro)](/en/concepts/nanjing-metro-line-7.html)：Line 7 (Nanjing Metro) is a metro line, with 27 stations.
- [南京地铁6号线](/en/concepts/nanjing-metro-line-6.html)：南京地铁6号线连接栖霞山与南京南站，在南京南站与S1号线贯通运营。
- [广州APM线](/en/concepts/guangzhou-metro-line-apmxian.html)：广州APM线是连接林和西与广州塔的旅客自动输送线路。

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