HU 7481 then KE 852 at Beijing
Haikou → Beijing → Seoul Incheon
Timetable, Beijing time
13:45HU 7481 from Haikou at the gate
10:40KE 852 to Seoul Incheon leaves the gate
20 h 55 apart on the timetable, overnight
KE 852 leaves 20 h 55 after HU 7481 arrives on the timetable: more than half a day, so not a connection we count.