CZ 6771 then HU 7233 at Guangzhou
Haikou → Guangzhou → Ningbo
Timetable, Guangzhou time
11:25CZ 6771 from Haikou at the gate
07:25HU 7233 to Ningbo leaves the gate
20 h apart on the timetable, overnight
HU 7233 leaves 20 h after CZ 6771 arrives on the timetable: more than half a day, so not a connection we count.