Of course everyone in this industry collects models, and we all know that COMAC is pushing the idea of a C919 as hard as it can. And Ryanair is looking for something new and of course, cheaper than the 737. Moreover, we do not imagine the Chief Pilot will be thrilled to hear of this snap taken of his desk. (The model has probably been hidden now). In a less cropped version of this image, we see no other models on the desk.
So this could be nothing or it might be something amusing.