CZ 8210 then 9C 6720 at Guangzhou
Bazhong → Guangzhou → Shanghai Hongqiao
Timetable, Guangzhou time
23:40CZ 8210 from Bazhong at the gate
16:359C 6720 to Shanghai Hongqiao leaves the gate
16 h 55 apart on the timetable, overnight
9C 6720 leaves 16 h 55 after CZ 8210 arrives on the timetable: more than half a day, so not a connection we count.