EU 6677 then MU 5033 at Pudong
Chengdu → Shanghai → Seoul
Timetable, Shanghai time
20:00EU 6677 from Chengdu at the gate
12:20MU 5033 to Seoul leaves the gate
16 h 20 apart on the timetable, overnight
MU 5033 leaves 16 h 20 after EU 6677 arrives on the timetable: more than half a day, so not a connection we count.