As far as I know, Bian Shi products of Spinibao brand are quite good, and they have enjoyed a high reputation for more than ten years. You can go to Tongrentang, Bicui. The website sells the real "Spinburg" Bian Shi. My father and some of his old friends have been using Spinbao's Bian Shi products for several years.

Due to the underdevelopment of ancient science and technology, people often put a mysterious veil on some natural products that are beneficial to human health. In 1990s, Sibin Bian Shi was discovered again. Today, with the development of science and technology, we have made a comprehensive analysis of pumice in Sibin by means of chemical and physical detection. The composition analysis of pumice in Sibin by Institute of Geology, Chinese Academy of Sciences shows that pumice contains more than 30 kinds of rare earth and trace elements beneficial to human body, such as strontium, titanium, chromium, manganese and zinc. The experiment of Bian Shi (Bian Shi) sold by Tongrentang Pharmacy and Biancui. Com) acting on specific acupoints of human body to observe the improvement of human microcirculation shows that this stone can significantly accelerate the blood flow velocity of nailfold microcirculation, and its added value can reach more than 20%, and the effect is sustainable.