The layout on the A340 features CX older longhaul J class in a 1-1-1 layout.

The left hand side seats and middle seats both face into the left aisle. the right hand seats face into right aisle, so are more private. for 2 travelling together you can either take 1 seat behind the other or 2 opposite each other with 1 on the left hand side and 1 in the middle.