9C 6726 then ZH 9675 at Guangzhou
Ningbo → Guangzhou → Harbin
Timetable, Guangzhou time
22:159C 6726 from Ningbo at the gate
16:40ZH 9675 to Harbin leaves the gate
18 h 25 apart on the timetable, overnight
ZH 9675 leaves 18 h 25 after 9C 6726 arrives on the timetable: more than half a day, so not a connection we count.