EU 6677 then IJ 4 at Pudong
Chengdu → Shanghai → Tokyo Narita
Timetable, Shanghai time
20:00EU 6677 from Chengdu at the gate
17:30IJ 4 to Tokyo Narita leaves the gate
21 h 30 apart on the timetable, overnight
IJ 4 leaves 21 h 30 after EU 6677 arrives on the timetable: more than half a day, so not a connection we count.