Alpinia katsumadai: The capsule is ovoid, ovoid or olive-shaped, with a length of1.5 ~ 3cm and a diameter of1~ 2cm; Yellow-brown or reddish-brown, slightly pointed at both ends, thick skin without thorns, protruding longitudinal ridges, cracking in brown, exposing seeds. The seeds are not clustered into balls, irregularly polygonal, grayish brown or brown; Outer white aril. Terrier. A slight breath and a slightly spicy taste. Amomum villosum: The capsule is oval, with a length of1.5-2cm and a width of1.2-2cm. It is purplish red when it is mature and brown when it is dry, and its surface is covered with soft thorns that don't crack. The seeds are polygonal, fragrant and bitter.