AA 4919 then CZ 438 at O'Hare
Milwaukee → Chicago → Shanghai
Timetable, Chicago time
12:54AA 4919 from Milwaukee at the gate
01:45CZ 438 to Shanghai leaves the gate
12 h 51 apart on the timetable, overnight
CZ 438 leaves 12 h 51 after AA 4919 arrives on the timetable: more than half a day, so not a connection we count.