AC 8905 then CZ 2502 at O'Hare
Toronto Pearson → Chicago → Shanghai
Timetable, Chicago time
13:13AC 8905 from Toronto Pearson at the gate
01:45CZ 2502 to Shanghai leaves the gate
12 h 32 apart on the timetable, overnight
CZ 2502 leaves 12 h 32 after AC 8905 arrives on the timetable: more than half a day, so not a connection we count.