CN 7140 then CA 1915 at Beijing
Harbin → Beijing → Zhengzhou
Timetable, Beijing time
21:30CN 7140 from Harbin at the gate
21:05CA 1915 to Zhengzhou leaves the gate
23 h 35 apart on the timetable, overnight
CA 1915 leaves 23 h 35 after CN 7140 arrives on the timetable: more than half a day, so not a connection we count.