Y8 7520 then MM 80 at Pudong
Zhengzhou → Shanghai → Osaka
Timetable, Shanghai time
11:50Y8 7520 from Zhengzhou at the gate
06:05MM 80 to Osaka leaves the gate
18 h 15 apart on the timetable, overnight
MM 80 leaves 18 h 15 after Y8 7520 arrives on the timetable: more than half a day, so not a connection we count.