AA 2925 then CZ 428 at O'Hare
Boston → Chicago → Shanghai
Timetable, Chicago time
21:54AA 2925 from Boston at the gate
21:25CZ 428 to Shanghai leaves the gate
23 h 31 apart on the timetable, overnight
CZ 428 leaves 23 h 31 after AA 2925 arrives on the timetable: more than half a day, so not a connection we count.