AA 4955 then CZ 2502 at O'Hare
Lexington → Chicago → Shanghai
Timetable, Chicago time
05:59AA 4955 from Lexington at the gate
20:50CZ 2502 to Shanghai leaves the gate
14 h 51 apart on the timetable
CZ 2502 leaves 14 h 51 after AA 4955 arrives on the timetable: more than half a day, so not a connection we count.