I passed the exam, and it was an upright one, because the test area was small and could not accommodate a piano as big as a triangle. However, there is still a difference in the sound between a grand piano and an upright piano. My home is a triangle, and it makes a lot of sound. The effect is good, the vertical type is relatively hidden, and it is suitable for use in environments such as neighborhoods.

I hope it can help you and hope you will adopt it!