CA 1492 then CA 1915 at Beijing
Zunyi → Beijing → Zhengzhou
Timetable, Beijing time
23:55CA 1492 from Zunyi at the gate
21:05CA 1915 to Zhengzhou leaves the gate
21 h 10 apart on the timetable, overnight
CA 1915 leaves 21 h 10 after CA 1492 arrives on the timetable: more than half a day, so not a connection we count.