AA 555 then CZ 2508 at O'Hare
Houston → Chicago → Guangzhou
Timetable, Chicago time
21:49AA 555 from Houston at the gate
19:50CZ 2508 to Guangzhou leaves the gate
22 h 01 apart on the timetable, overnight
CZ 2508 leaves 22 h 01 after AA 555 arrives on the timetable: more than half a day, so not a connection we count.