Knowledge Title: Pearl Other Title: pearl Knowledge Content:  A solid grain of matter formed by a substance secreted by the film of a shellfish coat. Ancient called true Zhu, true beads, beads, beads. The beginning of the Song Dynasty was called pearls. Because of the rare and shape, color popular and has always been regarded as a valuable ornament. Ancient China was also often used as a tribute and a reward. The Iranian royal family once had a pearl weighing 32 grams. Modern times mainly used to make necklaces, bracelets, rings, earrings and other handicrafts. Pearls can also be used as raw materials for daily cosmetics. Because pearls have a god of calm, the wind, clear hot sputum, go to the eye, detoxifying raw muscles and other functions, but also many special effects of Chinese medicine indispensable ingredients.  Along the way, “Shangshu Gong” contains the story of the people of the Huaihe River basin after the water treatment of the great water to pay tribute to the emperor with fresh water pearls.……

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