Line 4, Nanjing Metro
      | Line 4, Nanjing Metro | 
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| Line 4 四号线
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| Overview | 
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| Type | Rapid transit | 
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| Status | under construction | 
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| Locale | Nanjing, China | 
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| Stations | 18 | 
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| Operation | 
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| Opened | 2016/2017 (Estimated) | 
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| Operator(s) | Nanjing Metro | 
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| Technical | 
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| Line length | 33.5 km (20.8 mi) | 
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| No. of tracks | 2 | 
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| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) | 
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Line 4 will be a future line on the Nanjing Metro system in China. Currently, 18 stations spanning a total of 33.5 km have already been planned to be part of the line.[1]
Station list
| Station Name English
 | Station Name Hanzi
 | Platform Types | Transfer | Location | 
|  | 
| Zhongbao | 中保 |  |  | 
| Caochangmen | 草场门 |  |  | 
| Yunnanlu | 云南路 |  |  | 
| Gulou | 鼓楼 |  | 1 | 
| Jimingsi | 鸡鸣寺 |  | 3 | 
| Jiuhuashan | 九华山 |  |  | 
| Suojincun | 锁金村 |  |  | 
| Huayuanlu | 花园路 |  |  | 
| Zijianshan North | 紫金山北 |  |  | 
| Jubaoshan | 聚宝山 |  |  | 
| Xuzhuang Software Park | 徐庄软件园 |  |  | 
| Jinmalu | 金马路 |  | 2 | 
| Huitonglu | 汇通路 |  |  | 
| Lingshan | 灵山 |  |  | 
| Dongliu | 东流 |  |  | 
| Mengbei | 孟北 |  |  | 
| Huashu | 桦墅 |  |  | 
| Xianlin East | 仙林东 |  |  | 
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 References 
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 |  |  | Urban Rapid Transit | | Lines in operation |  | 
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 |  |  | Lines under construction |  | 
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 |  |  | Planned lines |  | 
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 |  |  | Suburban Rapid Transit | | Lines in operation |  | 
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 |  |  | Lines under construction |  | 
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 |  |  | Planned lines |  | 
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