AA 4192 then CZ 2508 at O'Hare
Rochester (ROC) → Chicago → Guangzhou
Timetable, Chicago time
22:00AA 4192 from Rochester (ROC) at the gate
19:50CZ 2508 to Guangzhou leaves the gate
21 h 50 apart on the timetable, overnight
CZ 2508 leaves 21 h 50 after AA 4192 arrives on the timetable: more than half a day, so not a connection we count.