AA 4802 then CZ 2502 at O'Hare
Harrisburg → Chicago → Shanghai
Timetable, Chicago time
16:35AA 4802 from Harrisburg at the gate
13:55CZ 2502 to Shanghai leaves the gate
21 h 20 apart on the timetable, overnight
CZ 2502 leaves 21 h 20 after AA 4802 arrives on the timetable: more than half a day, so not a connection we count.