AA 6212 then CZ 2502 at O'Hare
Madison → Chicago → Shanghai
Timetable, Chicago time
12:55AA 6212 from Madison at the gate
01:45CZ 2502 to Shanghai leaves the gate
12 h 50 apart on the timetable, overnight
CZ 2502 leaves 12 h 50 after AA 6212 arrives on the timetable: more than half a day, so not a connection we count.