DL 5591 then CZ 436 at O'Hare
New York JFK → Chicago → Shanghai
Timetable, Chicago time
21:44DL 5591 from New York JFK at the gate
19:25CZ 436 to Shanghai leaves the gate
21 h 41 apart on the timetable, overnight
CZ 436 leaves 21 h 41 after DL 5591 arrives on the timetable: more than half a day, so not a connection we count.