UA 4749 then CA 1016 at O'Hare
Detroit → Chicago → Shanghai
Timetable, Chicago time
11:29UA 4749 from Detroit at the gate
23:30CA 1016 to Shanghai leaves the gate
12 h 01 apart on the timetable
CA 1016 leaves 12 h 01 after UA 4749 arrives on the timetable: more than half a day, so not a connection we count.