SQ 631 then MU 898 at Changi
Tokyo Haneda → Singapore → Hangzhou
Timetable, Singapore time
15:00SQ 631 from Tokyo Haneda at the gate
03:30MU 898 to Hangzhou leaves the gate
12 h 30 apart on the timetable, overnight
MU 898 leaves 12 h 30 after SQ 631 arrives on the timetable: more than half a day, so not a connection we count.