CZ 3000 then 3U 1808 at Guangzhou
Beijing Daxing → Guangzhou → Haikou
Timetable, Guangzhou time
12:40CZ 3000 from Beijing Daxing at the gate
16:303U 1808 to Haikou leaves the gate
3 h 50 apart on the timetable
The last days
CZ 3000 and 3U 1808 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.