TR 671 then SQ 850 at Changi
Chiang Rai → Singapore → Guangzhou
Timetable, Singapore time
19:40TR 671 from Chiang Rai at the gate
08:05SQ 850 to Guangzhou leaves the gate
12 h 25 apart on the timetable, overnight
SQ 850 leaves 12 h 25 after TR 671 arrives on the timetable: more than half a day, so not a connection we count.