CA 1380 then CA 1491 at Beijing
Guangzhou → Beijing → Zunyi
Timetable, Beijing time
12:40CA 1380 from Guangzhou at the gate
09:30CA 1491 to Zunyi leaves the gate
20 h 50 apart on the timetable, overnight
CA 1491 leaves 20 h 50 after CA 1380 arrives on the timetable: more than half a day, so not a connection we count.