Yixing teapot is a unique handmade pottery of Han nationality. The raw material is purple sand mud, which originated in Dingshu Town, Yixing, Jiangsu Province, hence the name. In the auction market, the market is bullish and it is an "antique" with collectible value. Famous works are often hard to find. As the saying goes, "Yixing purple sand is the most sought-after in the world."

Changxing is the only producer of purple sand handicrafts in Zhejiang Province. The teapot made of Changxing purple sand is basically hand-shaped, with simple and elegant shape, decent carving and decoration, compact structure and mellow and simple color. Because of its exquisite and elegant production and practical function, it has become a unique tourism product.

The name Yanhu Zisha has not been widely circulated. In the end, it is a brand word of Zisha. It is understood that it also belongs to Yixing, and the raw materials and production techniques are similar.

They belong to the relationship between inclusion and inclusion, and cannot be equated.