CN 7140 then CA 1801 at Beijing
Harbin → Beijing → Xiamen
Timetable, Beijing time
22:30CN 7140 from Harbin at the gate
20:15CA 1801 to Xiamen leaves the gate
21 h 45 apart on the timetable, overnight
CA 1801 leaves 21 h 45 after CN 7140 arrives on the timetable: more than half a day, so not a connection we count.