DL 281 then EU 6678 at Pudong
Seattle → Shanghai → Chengdu
Timetable, Shanghai time
19:55DL 281 from Seattle at the gate
12:55EU 6678 to Chengdu leaves the gate
17 h apart on the timetable, overnight
EU 6678 leaves 17 h after DL 281 arrives on the timetable: more than half a day, so not a connection we count.