| Other Name: | Line 9 Suburban line |
| Type: | Rapid transit |
| System: | Zhengzhou Metro |
| Status: | Operational |
| Locale: | Zhengzhou, Henan, China |
| Start: | (through service) |
| End: | Zhengzhou Hangkonggang Railway Station |
| Stations: | 19 (18 in operation) |
| Operator: | Zhengzhou Metro Group Corporation |
| Character: | Underground and elevated |
| Depot: | Mengzhuang Depot |
| Linelength: | 40.842NaN2 |
| Tracks: | 2 |
| Map State: | collapsed |
Chengjiao line of the Zhengzhou Metro, planned to be part of Line 9 in the future, is a rapid transit line in Zhengzhou. It was opened on 12 January 2017. This line is 40.842NaN2 long with 19 stations (16 stations in operation).[1]
Through services are operated on Line 2 and Chengjiao line, although they are classified as separate lines.[2]
| Segment | Commencement | Length | Station(s) | Name | |
|---|---|---|---|---|---|
| Nansihuan — Xinzheng International Airport | 12 January 2017 | 31.72NaN2[3] | 11 | Phase 1 | |
| Kangpinghu | 16 November 2017 | Infill station | 1 | ||
| Gangqu North | 12 December 2020 | Infill station | 1 | ||
| Xinzheng International Airport — Zhengzhou Hangkonggang Railway Station | 20 June 2022[4] | 8.982NaN2[5] | 3 | Phase 2 | |
| Xiaoqiao & Hua'nancheng Dong[6] | 22 September 2023 | Infill stations | 2 |