AA 3523 then CZ 438 at O'Hare
Baltimore → Chicago → Shanghai
Timetable, Chicago time
12:59AA 3523 from Baltimore at the gate
01:45CZ 438 to Shanghai leaves the gate
12 h 46 apart on the timetable, overnight
CZ 438 leaves 12 h 46 after AA 3523 arrives on the timetable: more than half a day, so not a connection we count.