EU 6677 then CZ 3836 at Pudong
Chengdu → Shanghai → Sanya
Timetable, Shanghai time
20:00EU 6677 from Chengdu at the gate
18:20CZ 3836 to Sanya leaves the gate
22 h 20 apart on the timetable, overnight
CZ 3836 leaves 22 h 20 after EU 6677 arrives on the timetable: more than half a day, so not a connection we count.