CA 1644 then CA 1491 at Beijing
Harbin → Beijing → Zunyi
Timetable, Beijing time
13:45CA 1644 from Harbin at the gate
09:30CA 1491 to Zunyi leaves the gate
19 h 45 apart on the timetable, overnight
CA 1491 leaves 19 h 45 after CA 1644 arrives on the timetable: more than half a day, so not a connection we count.