CA 4143 then OM 224 at Beijing
Chongqing → Beijing → Ulaanbaatar
Timetable, Beijing time
18:00CA 4143 from Chongqing at the gate
11:30OM 224 to Ulaanbaatar leaves the gate
17 h 30 apart on the timetable, overnight
OM 224 leaves 17 h 30 after CA 4143 arrives on the timetable: more than half a day, so not a connection we count.