UA 4183 then CA 1054 at O'Hare
St Louis → Chicago → Beijing
Timetable, Chicago time
10:04UA 4183 from St Louis at the gate
09:30CA 1054 to Beijing leaves the gate
23 h 26 apart on the timetable, overnight
CA 1054 leaves 23 h 26 after UA 4183 arrives on the timetable: more than half a day, so not a connection we count.