ZH 9864 then 3U 1071 at Guangzhou
Nanjing → Guangzhou → Xi'an
Timetable, Guangzhou time
13:55ZH 9864 from Nanjing at the gate
21:153U 1071 to Xi'an leaves the gate
7 h 20 apart on the timetable
The last days
ZH 9864 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.