CZ 6777 then HU 7233 at Guangzhou
Haikou → Guangzhou → Ningbo
Timetable, Guangzhou time
15:25CZ 6777 from Haikou at the gate
07:25HU 7233 to Ningbo leaves the gate
16 h apart on the timetable, overnight
HU 7233 leaves 16 h after CZ 6777 arrives on the timetable: more than half a day, so not a connection we count.