AM 682 then CZ 436 at O'Hare
Mexico City → Chicago → Shanghai
Timetable, Chicago time
23:39AM 682 from Mexico City at the gate
18:50CZ 436 to Shanghai leaves the gate
19 h 11 apart on the timetable, overnight
CZ 436 leaves 19 h 11 after AM 682 arrives on the timetable: more than half a day, so not a connection we count.