UA 5437 then CZ 436 at O'Hare
Duluth → Chicago → Shanghai
Timetable, Chicago time
20:13UA 5437 from Duluth at the gate
19:25CZ 436 to Shanghai leaves the gate
23 h 12 apart on the timetable, overnight
CZ 436 leaves 23 h 12 after UA 5437 arrives on the timetable: more than half a day, so not a connection we count.