AA 536 then CZ 2502 at O'Hare
Charlotte → Chicago → Shanghai
Timetable, Chicago time
17:51AA 536 from Charlotte at the gate
13:55CZ 2502 to Shanghai leaves the gate
20 h 04 apart on the timetable, overnight
CZ 2502 leaves 20 h 04 after AA 536 arrives on the timetable: more than half a day, so not a connection we count.