HU 7246 then HU 4321 at Beijing
Urumqi → Beijing → Haikou
Timetable, Beijing time
22:40HU 7246 from Urumqi at the gate
22:30HU 4321 to Haikou leaves the gate
23 h 50 apart on the timetable, overnight
HU 4321 leaves 23 h 50 after HU 7246 arrives on the timetable: more than half a day, so not a connection we count.