BR 658 then HU 7976 at Toronto Pearson
Chicago O'Hare → Toronto → Beijing
Timetable, Toronto time
17:39BR 658 from Chicago O'Hare at the gate
16:10HU 7976 to Beijing leaves the gate
22 h 31 apart on the timetable, overnight
HU 7976 leaves 22 h 31 after BR 658 arrives on the timetable: more than half a day, so not a connection we count.