Gua sha, as a traditional health preservation therapy, has attracted much attention. Among them, copper and stainless steel gua sha each have their own characteristics. The copper gua sha has good thermal conductivity and can promote blood circulation with warm stimulation. Its metallic properties may have a subtle reaction with the human body. The stainless steel guasha is strong, wear-resistant, not easy to rust or deform, can maintain a precise scraping edge for a long time, is smooth in operation and convenient for cleaning. There are differences between the two in terms of material characteristics, usage experience and efficacy. A deep understanding of their differences helps to select a more suitable guasha board according to personal needs during health preservation and wellness.