CZ 759 then EW 7521 at Barcelona
Doha → Barcelona → Hamburg
Timetable, Barcelona time
07:05CZ 759 from Doha at the gatealso IB 6201, LA 7405
19:10EW 7521 to Hamburg leaves the gate
12 h 05 apart on the timetable
EW 7521 leaves 12 h 05 after CZ 759 arrives on the timetable: more than half a day, so not a connection we count.