SQ 839 then SQ 215 at Changi
Hangzhou → Singapore → Perth
Timetable, Singapore time
06:20SQ 839 from Hangzhou at the gate
19:00SQ 215 to Perth leaves the gate
12 h 40 apart on the timetable
SQ 215 leaves 12 h 40 after SQ 839 arrives on the timetable: more than half a day, so not a connection we count.