CA 8321 then EU 6678 at Pudong
Beijing Daxing → Shanghai → Chengdu
Timetable, Shanghai time
13:00CA 8321 from Beijing Daxing at the gate
12:55EU 6678 to Chengdu leaves the gate
23 h 55 apart on the timetable, overnight
EU 6678 leaves 23 h 55 after CA 8321 arrives on the timetable: more than half a day, so not a connection we count.