CZ 3264 then ZH 8991 at Guangzhou
Dazhou → Guangzhou → Haikou
Timetable, Guangzhou time
23:15CZ 3264 from Dazhou at the gate
15:55ZH 8991 to Haikou leaves the gate
16 h 40 apart on the timetable, overnight
ZH 8991 leaves 16 h 40 after CZ 3264 arrives on the timetable: more than half a day, so not a connection we count.