CA 8582 then EU 6678 at Pudong
Guangzhou → Shanghai → Chengdu
Timetable, Shanghai time
16:00CA 8582 from Guangzhou at the gate
12:55EU 6678 to Chengdu leaves the gate
20 h 55 apart on the timetable, overnight
EU 6678 leaves 20 h 55 after CA 8582 arrives on the timetable: more than half a day, so not a connection we count.