ZH 9521 then 9C 6567 at Pudong
Shenzhen → Shanghai → Nanyang
Timetable, Shanghai time
18:55ZH 9521 from Shenzhen at the gate
18:509C 6567 to Nanyang leaves the gate
23 h 55 apart on the timetable, overnight
9C 6567 leaves 23 h 55 after ZH 9521 arrives on the timetable: more than half a day, so not a connection we count.