Line 3 has 25 underground stations, including four interchanges, while Line 5 has 18 underground stations with three interchanges.
Line 5 will eventually be 35km long with 26 stations, with the first phase costing Yaun 16.9bn ($US 2.3bn).
Phase 1 of the Changsha Metro Line 5 passed its pre-operation safety assessment at the end of May, followed by Phase 1 of Line 3 on June 7-10. Construction of the first phase of Line 3 started in January 2014, while the first phase of Line 5 has been under construction since November 2015.
All stations along the two lines are equipped to allow mobile ticketing.
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