AA 535 then CZ 2508 at O'Hare
Charlotte → Chicago → Guangzhou
Timetable, Chicago time
22:30AA 535 from Charlotte at the gate
19:50CZ 2508 to Guangzhou leaves the gate
21 h 20 apart on the timetable, overnight
CZ 2508 leaves 21 h 20 after AA 535 arrives on the timetable: more than half a day, so not a connection we count.