AA 2202 then CZ 438 at O'Hare
Buffalo → Chicago → Shanghai
Timetable, Chicago time
20:00AA 2202 from Buffalo at the gate
18:25CZ 438 to Shanghai leaves the gate
22 h 25 apart on the timetable, overnight
CZ 438 leaves 22 h 25 after AA 2202 arrives on the timetable: more than half a day, so not a connection we count.