AA 2903 then CZ 2502 at O'Hare
Washington National → Chicago → Shanghai
Timetable, Chicago time
07:25AA 2903 from Washington National at the gate
20:50CZ 2502 to Shanghai leaves the gate
13 h 25 apart on the timetable
CZ 2502 leaves 13 h 25 after AA 2903 arrives on the timetable: more than half a day, so not a connection we count.