CZ 3264 then CZ 3545 at Guangzhou
Dazhou → Guangzhou → Shanghai Hongqiao
Timetable, Guangzhou time
23:15CZ 3264 from Dazhou at the gate
17:00CZ 3545 to Shanghai Hongqiao leaves the gate
17 h 45 apart on the timetable, overnight
CZ 3545 leaves 17 h 45 after CZ 3264 arrives on the timetable: more than half a day, so not a connection we count.