AA 858 then CZ 2502 at O'Hare
Palm Springs → Chicago → Shanghai
Timetable, Chicago time
18:50AA 858 from Palm Springs at the gate
13:55CZ 2502 to Shanghai leaves the gate
19 h 05 apart on the timetable, overnight
CZ 2502 leaves 19 h 05 after AA 858 arrives on the timetable: more than half a day, so not a connection we count.