CA 1920 then KE 852 at Beijing
Haikou → Beijing → Seoul Incheon
Timetable, Beijing time
12:55CA 1920 from Haikou at the gate
10:40KE 852 to Seoul Incheon leaves the gate
21 h 45 apart on the timetable, overnight
KE 852 leaves 21 h 45 after CA 1920 arrives on the timetable: more than half a day, so not a connection we count.