Yang Yi's bian stone is more expensive. Personally, I think there are the following reasons: 1, celebrity effect. Teacher Yang Yi is a famous health expert. He published a series of books "Self-treatment from Hand to Disease", and also made many programs in Yangshengtang and Hunan Satellite TV. 2. The color of bian stone. Unlike other brands of bianshi, Yangyi bianshi is dark brown. The reserve of bian stone itself is small, and the dark brown bian stone is even less, so the cost and price are relatively high.