ET 574 then CZ 438 at O'Hare
Rome → Chicago → Shanghai
Timetable, Chicago time
07:40ET 574 from Rome at the gate
01:45CZ 438 to Shanghai leaves the gate
18 h 05 apart on the timetable, overnight
CZ 438 leaves 18 h 05 after ET 574 arrives on the timetable: more than half a day, so not a connection we count.