CA 4223 then EU 6678 at Pudong
Guiyang → Shanghai → Chengdu
Timetable, Shanghai time
19:05CA 4223 from Guiyang at the gate
12:55EU 6678 to Chengdu leaves the gate
17 h 50 apart on the timetable, overnight
EU 6678 leaves 17 h 50 after CA 4223 arrives on the timetable: more than half a day, so not a connection we count.