AA 1202 then CZ 2502 at O'Hare
Miami → Chicago → Shanghai
Timetable, Chicago time
15:43AA 1202 from Miami at the gate
13:55CZ 2502 to Shanghai leaves the gate
22 h 12 apart on the timetable, overnight
CZ 2502 leaves 22 h 12 after AA 1202 arrives on the timetable: more than half a day, so not a connection we count.