It is a peculiar art form in China to draw inside. The artists regard glass and crystal material as the base of the pot. They use the purpose-built thin pen of deformation to paint the wonderful picture in a subtle way in the backhand in the bottle of the beans. While drawing a picture, they hold the breath at the pubic region angrily and let the strength be sent on the wrist. It is beyond eyes in meticulous place. It is called superb craftsmanship. It is praised as peculiar , magnificent , rich artistic treasure of reserve value.