CK 221 then UA 1075 at LAX
Shanghai → Los Angeles → Cancún
Timetable, Los Angeles time
10:00CK 221 from Shanghai at the gate
23:49UA 1075 to Cancún leaves the gate
13 h 49 apart on the timetable
UA 1075 leaves 13 h 49 after CK 221 arrives on the timetable: more than half a day, so not a connection we count.