The extension currently serves four stations, although a fifth station has been constructed at Wapenyao.
Services on Line 1 are operated by a fleet of six-car Type B trains supplied by CRRC Changchun Railway Vehicles.
The opening of the extension takes the total length of the Harbin metro network to 31.5km.
The first section of Line 1 was inaugurated in 2013 and the initial phase of Line 3 opened in January 2017.
The 27.8km Line 2 from Harbin North Station to Jinshanlu is due to open next year.
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