UA 490 then CZ 2502 at O'Hare
Cleveland → Chicago → Shanghai
Timetable, Chicago time
07:40UA 490 from Cleveland at the gate
01:45CZ 2502 to Shanghai leaves the gate
18 h 05 apart on the timetable, overnight
CZ 2502 leaves 18 h 05 after UA 490 arrives on the timetable: more than half a day, so not a connection we count.