ZH 9996 then 3U 1071 at Guangzhou
Qingdao → Guangzhou → Xi'an
Timetable, Guangzhou time
14:40ZH 9996 from Qingdao at the gate
21:153U 1071 to Xi'an leaves the gate
6 h 35 apart on the timetable
The last days
ZH 9996 and 3U 1071 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.