AA 2245 then CZ 2502 at O'Hare
Sacramento → Chicago → Shanghai
Timetable, Chicago time
20:04AA 2245 from Sacramento at the gate
13:55CZ 2502 to Shanghai leaves the gate
17 h 51 apart on the timetable, overnight
CZ 2502 leaves 17 h 51 after AA 2245 arrives on the timetable: more than half a day, so not a connection we count.