CA 1690 then HU 7297 at Beijing
Harbin → Beijing → Lanzhou
Timetable, Beijing time
17:10CA 1690 from Harbin at the gate
15:45HU 7297 to Lanzhou leaves the gate
22 h 35 apart on the timetable, overnight
HU 7297 leaves 22 h 35 after CA 1690 arrives on the timetable: more than half a day, so not a connection we count.