Introduction to physical objects: Suzhou's silk products have been endless, from Wu Xi in the Spring and Autumn Period to Wu Ling in the Three Kingdoms and Jin Dynasties; from the eight silk and Fei Ling in the Sui and Tang Dynasties to Song brocade and Kesi; Song, Yuan, During the Ming and Qing Dynasties, the government weaving bureau was set up, and its products were even more diverse: mainly Zhang satin, gold-woven satin, shiny satin, floral satin, copy satin, tribute satin, velvet, Korean yarn, floral satin, etc.