3U 8121 then CZ 3263 at Guangzhou
Chongqing → Guangzhou → Dazhou
Timetable, Guangzhou time
15:303U 8121 from Chongqing at the gate
10:25CZ 3263 to Dazhou leaves the gate
18 h 55 apart on the timetable, overnight
CZ 3263 leaves 18 h 55 after 3U 8121 arrives on the timetable: more than half a day, so not a connection we count.