VZ 205 then FM 834 at Bangkok
Udon Thani → Bangkok → Shanghai
Timetable, Bangkok time
17:10VZ 205 from Udon Thani at the gate
16:50FM 834 to Shanghai leaves the gate
23 h 40 apart on the timetable, overnight
FM 834 leaves 23 h 40 after VZ 205 arrives on the timetable: more than half a day, so not a connection we count.