The raw material of nine-processed ebony is plum. After 1, material selection 2, pickling 3, rinsing 4, sun-drying 5, soaking 6, sun-drying 7, oil spraying 8, 10, steaming 9 and 9, it is called nine-system, because salted plum can be made after nine processes. After soaking and drying in the sun, through this series of steaming, the plum fruit has already become thick and crisp, with moderate sweetness and sourness, and made into preserved plum. In this case, branches and leaves and rotten fruits are not removed, and after pickling, they are smoked by fireworks, soaked in salt water and sun bath, and then frost is formed. One plate is made of other ebony, and some ebony is made of brown, burnt and charcoal. The fried surface is black and the pulp is convex. Therefore, the raw material of nine-system ebony is not ebony, but various plums. After nine complicated processes, the plum blank is made and smoked or fried to black. We call him Jiuji ebony, but he is not ebony.

Mume has certain medicinal value, and it is rich in species.