CA 1506 then KE 852 at Beijing
Fuzhou → Beijing → Seoul Incheon
Timetable, Beijing time
15:55CA 1506 from Fuzhou at the gate
10:40KE 852 to Seoul Incheon leaves the gate
18 h 45 apart on the timetable, overnight
KE 852 leaves 18 h 45 after CA 1506 arrives on the timetable: more than half a day, so not a connection we count.