CZ 2124 then MF 3712 at Guangzhou
Tianjin → Guangzhou → Shanghai Hongqiao
Timetable, Guangzhou time
15:40CZ 2124 from Tianjin at the gate
18:30MF 3712 to Shanghai Hongqiao leaves the gatealso MU 3873, 3U 4604, 3U 5176, ZH 5212, HO 5359, MF 5740
2 h 50 apart on the timetable
The last days
CZ 2124 and MF 3712 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.