ZH 9525 then 9C 8843 at Pudong
Shenzhen → Shanghai → Dalian
Timetable, Shanghai time
20:25ZH 9525 from Shenzhen at the gate
20:209C 8843 to Dalian leaves the gate
23 h 55 apart on the timetable, overnight
9C 8843 leaves 23 h 55 after ZH 9525 arrives on the timetable: more than half a day, so not a connection we count.