1, triangle iron: triangle iron is a percussion instrument made of thin steel bars bent into triangles. When hitting with a metal bar, the pronunciation is crisp and pleasant, and the penetration is strong, which is suitable for simple and rhythmic knocking. You can also put the metal bar in a triangular iron ring to rotate and play a "rolling" effect.

2. String bell: The bell is made of copper. Can be used for strong beat or weak beat of music respectively. When in use, you can naturally shake it with one hand, or you can hold the bell with your right hand and ring it with your left hand.