CA 1492 then CA 1455 at Beijing
Zunyi → Beijing → Mianyang
Timetable, Beijing time
23:55CA 1492 from Zunyi at the gate
17:35CA 1455 to Mianyang leaves the gate
17 h 40 apart on the timetable, overnight
CA 1455 leaves 17 h 40 after CA 1492 arrives on the timetable: more than half a day, so not a connection we count.