AA 808 then CZ 2502 at O'Hare
Washington National → Chicago → Shanghai
Timetable, Chicago time
14:29AA 808 from Washington National at the gate
13:55CZ 2502 to Shanghai leaves the gate
23 h 26 apart on the timetable, overnight
CZ 2502 leaves 23 h 26 after AA 808 arrives on the timetable: more than half a day, so not a connection we count.