CA 839 then QR 3616 at Barcelona
Shanghai → Barcelona → Firenze
Timetable, Barcelona time
07:25CA 839 from Shanghai at the gate
19:50QR 3616 to Firenze leaves the gate
12 h 25 apart on the timetable
QR 3616 leaves 12 h 25 after CA 839 arrives on the timetable: more than half a day, so not a connection we count.