EU 6677 then FM 9257 at Pudong
Chengdu → Shanghai → Xiamen
Timetable, Shanghai time
20:00EU 6677 from Chengdu at the gate
14:20FM 9257 to Xiamen leaves the gate
18 h 20 apart on the timetable, overnight
FM 9257 leaves 18 h 20 after EU 6677 arrives on the timetable: more than half a day, so not a connection we count.