Pine shell: oval, uniform size and no more than cm in diameter. The top is slightly pointed and closed. Bottom flat, upright and stable. The outer two scales are large and large, and the small scales are wrapped in large, heart-shaped scales, leaving a crescent shape, commonly known as "cuddle moon". The exterior is pure white and shiny. The texture is hard and brittle.

     Cigu: also known as the mother of tuber, the mother of the grass, the shape is similar to the female chuanbei, but the base is umbilical concave, the root has whiskers. The surface is yellow or yellowish brown. Smooth, non-flaps. It is hard and hard to fold, weak in gas and bitter in taste. This product contains colchicine, a poisonous herb, overdose can cause central nervous paralysis and death. Traditional Chinese medicine is used to treat carbuncle, scrofula and arthritis. It is different from the cough and sputum and heat dissipating of sichuan bei mother.

     Aunt guang: also known as guang gu, medicinal materials are conical. Apex acuminate, base rounded. Central concave, non-flaps, granule is slightly larger, the surface is yellow or light brown, smooth. One side has a longitudinal groove to the top. It's hard and crisp. Section white, powdery, with a conical heart. The air is small and the taste is weak.