CZ 3387 then CZ 3333 at Guangzhou
Changsha → Guangzhou → Meixian
Timetable, Guangzhou time
10:00CZ 3387 from Changsha at the gate
06:30CZ 3333 to Meixian leaves the gate
20 h 30 apart on the timetable, overnight
CZ 3333 leaves 20 h 30 after CZ 3387 arrives on the timetable: more than half a day, so not a connection we count.