The violin sounds a little boring.

Yes, because your sound column and bridge are controlled by vibration, so. . . . Another possibility is that it rains sometimes because of the weather, and it is normal for the lyre not to adapt. In addition, is your bridge horse 90 degrees perpendicular to the piano surface? If so, the sound will be better. Finally, the piano should be cleaned frequently, otherwise the piano's own voice will be choked by rosin.