CA 1492 then CA 1309 at Beijing
Zunyi → Beijing → Guangzhou
Timetable, Beijing time
23:55CA 1492 from Zunyi at the gate
18:00CA 1309 to Guangzhou leaves the gate
18 h 05 apart on the timetable, overnight
CA 1309 leaves 18 h 05 after CA 1492 arrives on the timetable: more than half a day, so not a connection we count.