CA 1512 then CA 1811 at Beijing
Nanchang → Beijing → Xiamen
Timetable, Beijing time
18:15CA 1512 from Nanchang at the gate
17:30CA 1811 to Xiamen leaves the gate
23 h 15 apart on the timetable, overnight
CA 1811 leaves 23 h 15 after CA 1512 arrives on the timetable: more than half a day, so not a connection we count.