CA 1254 then SQ 805 at Beijing
Urumqi → Beijing → Singapore
Timetable, Beijing time
20:40CA 1254 from Urumqi at the gate
08:45SQ 805 to Singapore leaves the gate
12 h 05 apart on the timetable, overnight
SQ 805 leaves 12 h 05 after CA 1254 arrives on the timetable: more than half a day, so not a connection we count.