ZH 9527 then FM 9397 at Pudong
Shenzhen → Shanghai → Changsha
Timetable, Shanghai time
23:40ZH 9527 from Shenzhen at the gate
21:25FM 9397 to Changsha leaves the gate
21 h 45 apart on the timetable, overnight
FM 9397 leaves 21 h 45 after ZH 9527 arrives on the timetable: more than half a day, so not a connection we count.