It's definitely a different design.
This new box wing uav is somewhat smaller than xianglong. While it holds a relatively similar configuration, the innumerable design differences from antennae dome's curve, to the angles of the wing join, to height, length, tail design, inlet geometry, engine nozzle, etc is completely different to that of xianglong.
If it were a xianglong derivative you would not see so many small differences, but rather a few very obvious design changes.
This new box wing uav is somewhat smaller than xianglong. While it holds a relatively similar configuration, the innumerable design differences from antennae dome's curve, to the angles of the wing join, to height, length, tail design, inlet geometry, engine nozzle, etc is completely different to that of xianglong.
If it were a xianglong derivative you would not see so many small differences, but rather a few very obvious design changes.