CA 1350 then KE 852 at Beijing
Changsha → Beijing → Seoul Incheon
Timetable, Beijing time
10:50CA 1350 from Changsha at the gate
10:40KE 852 to Seoul Incheon leaves the gate
23 h 50 apart on the timetable, overnight
KE 852 leaves 23 h 50 after CA 1350 arrives on the timetable: more than half a day, so not a connection we count.