| Zhonghe–Xinlu line | 
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|  | 
| Daqiaotou station platform | 
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| Other name(s) | Orange line | 
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| Status | In service | 
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| Locale | Taipei and New Taipei, Taiwan | 
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| Termini |  | 
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| Stations | 26 | 
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| Color on map | Orange | 
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| Type | Rapid transit | 
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| Services | 
Nanshijiao–Huilong (Xinzhuang branch)Nanshijiao–Luzhou (Luzhou branch)
 | 
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| Operator(s) | Taipei Rapid Transit Corporation | 
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| Depot(s) |  | 
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| Rolling stock | C371 (6-car) | 
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| Opened | 
24 December 1998 (1998-12-24) (Nanshijiao–Guting)3 November 2010 (2010-11-03) (Zhongxiao Xinsheng–Luzhou)5 January 2012 (2012-01-05) (Daqiaotou–Fu Jen University)30 September 2012 (2012-09-30) (Guting–Zhongxiao Xinsheng)29 June 2013 (2013-06-29) (Fu Jen University–Huilong)
 | 
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|
| Line length | 29.3 km (18.2 mi) | 
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| Character | Underground | 
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| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | 
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| Electrification | 750 V DC third rail | 
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| Operating speed | 80 km/h (50 mph) | 
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|  | 
The Zhonghe–Xinlu or Orange line (code O) is a metro line in Taipei operated by the Taipei Metro, named after the districts it connects: Zhonghe, Xinzhuang and Luzhou. The line starts at Nanshijiao in Zhonghe, passes through central Taipei, then splits into two branches: one to Huilong via Xinzhuang and one to Luzhou.
The southern section between Nanshijiao and Guting opened in 1998. It was then connected to the Tamsui Line. Due to heavy traffic for residents in the districts of Luzhou and Sanchong travelling in and out of central Taipei, a metro line was planned to meet this urgent need. The line would eventually consist of two branches which connects to Guting via central Taipei. The extension fully opened in 2012.
The entire line, with the exception of the Luzhou and Xinzhuang maintenance depots, is underground.