This is a fascia knife for muscle relaxation after exercise. At the beginning of the design, it was conceived to de-tool expression, hoping to be more inclined to beauty equipment for female users. The design of this fascia knife is a gentle curve. The use of curve echoes to express light technology, through concise and highly recognizable arc elements and stretched curves, gives the product technology massage concept at the same time, reduces the product communication and marketing costs, and forms differentiation with similar products on the market.