3U 3935 then KR 704 at Bangkok
Chengdu → Bangkok → Phnom Penh
Timetable, Bangkok time
17:203U 3935 from Chengdu at the gate
16:15KR 704 to Phnom Penh leaves the gate
22 h 55 apart on the timetable, overnight
KR 704 leaves 22 h 55 after 3U 3935 arrives on the timetable: more than half a day, so not a connection we count.