说明：  一个非常漂亮的可弹奏激光电子竖琴，用手弹的时候遮挡住激光柱，就会发出相应的声音.包括制作过程，程序，原理，实物图，有需要的话可以参考一下
(A very beautiful laser electronic harp can be played. When it is played by hand, the laser column is blocked, and the corresponding sound will be emitted. It includes the production process, procedures, principles, physical drawings, if necessary, you can refer to it.)