1. The most classic Mentougou millstone: short pile, shoulder-shaped, square belly.

2. Mentougou Jingbaling is small: the main tendons of the Eight Roads are thick and obvious.

3. Zhengyuan/steamed bun piles: There are many production areas of this kind, such as Hebei, Tianjin, Langya Mountain, Yanqing, etc., but the Zhengyuan ones are small and difficult to get together.

4. Dense ant pattern: The pattern is fine, deep and textured, and is generally liked by everyone.

5. Mentougou Yuanbao: Unlike the Mentougou millstone, it is not so regular and has short piles and shoulders.