AA 4994 then CZ 438 at O'Hare
Oklahoma City → Chicago → Shanghai
Timetable, Chicago time
09:10AA 4994 from Oklahoma City at the gate
01:45CZ 438 to Shanghai leaves the gate
16 h 35 apart on the timetable, overnight
CZ 438 leaves 16 h 35 after AA 4994 arrives on the timetable: more than half a day, so not a connection we count.