AA 215 then CZ 438 at O'Hare
Cancún → Chicago → Shanghai
Timetable, Chicago time
17:40AA 215 from Cancún at the gate
17:20CZ 438 to Shanghai leaves the gate
23 h 40 apart on the timetable, overnight
CZ 438 leaves 23 h 40 after AA 215 arrives on the timetable: more than half a day, so not a connection we count.