Cracked jade jewelry is stained and can't be washed out for a long time. It is usually necessary to protect the appearance of jade ornaments from external forces, but it has no effect on the internal water loss. In fact, the best "maintenance", the simplest and most practical way is to wear them as human ornaments. No matter where you are in the human body, it will replenish the water loss of Cui, make it moist and raise the water head, and some "cotton" and "floc" will lose their denaturation. This is the so-called "human cultivation". The first is to avoid confrontation and damage jade ornaments; The second is to avoid high temperature exposure, so as not to lose moisture and luster, dry and white jade jewelry; The third is to wear it often, and often soak it with a soft cloth or sponge to wipe off the dirt left on it.