AA 434 then CZ 438 at O'Hare
San Francisco → Chicago → Shanghai
Timetable, Chicago time
06:59AA 434 from San Francisco at the gate
19:25CZ 438 to Shanghai leaves the gate
12 h 26 apart on the timetable
CZ 438 leaves 12 h 26 after AA 434 arrives on the timetable: more than half a day, so not a connection we count.