KE 834 then M0 602 at Incheon
Shenyang → Seoul → Ulaanbaatar
Timetable, Seoul time
19:35KE 834 from Shenyang at the gate
17:45M0 602 to Ulaanbaatar leaves the gate
22 h 10 apart on the timetable, overnight
M0 602 leaves 22 h 10 after KE 834 arrives on the timetable: more than half a day, so not a connection we count.