CZ 314 then EU 6678 at Pudong
Seoul → Shanghai → Chengdu
Timetable, Shanghai time
13:55CZ 314 from Seoul at the gate
12:55EU 6678 to Chengdu leaves the gate
23 h apart on the timetable, overnight
EU 6678 leaves 23 h after CZ 314 arrives on the timetable: more than half a day, so not a connection we count.