CA 1492 then CA 1449 at Beijing
Zunyi → Beijing → Chongqing
Timetable, Beijing time
23:55CA 1492 from Zunyi at the gate
18:45CA 1449 to Chongqing leaves the gate
18 h 50 apart on the timetable, overnight
CA 1449 leaves 18 h 50 after CA 1492 arrives on the timetable: more than half a day, so not a connection we count.