TK 281 then JU 423 at Istanbul
Shanghai → Istanbul → Belgrade
Timetable, Istanbul time
17:10TK 281 from Shanghai at the gate
16:40JU 423 to Belgrade leaves the gate
23 h 30 apart on the timetable, overnight
JU 423 leaves 23 h 30 after TK 281 arrives on the timetable: more than half a day, so not a connection we count.