Associated with the progress of weapon manufacturing, the traditional hand tools and farm tools in Song Dynasty also made corresponding progress. In terms of casting workpieces, the Northern Song Dynasty left the bronze Buddha in longxing temple, Zhengding County, Hebei Province (weighing 654.38+ 10,000 Jin) and iron pagoda in yuquan temple, Dangyang County, Hubei Province (grade 654.38+03, weighing 654.38+ 10,000 Jin, casting in stages, exquisite craftsmanship and vivid decorative image). China's traditional ceramic manufacturing technology has been further improved-foreign trade has always been the driving force for the development of this traditional handicraft industry. The techniques of colored porcelain, celadon and white porcelain in Song Dynasty surpassed those in Tang Dynasty. During 900 ~ 1000 years (from the Five Dynasties and Ten Kingdoms to the early Northern Song Dynasty), porcelain-making technology spread to Persia, and then easily spread to those western regions that had mastered pottery-making technology. 1223, Japanese Kojiro Kato came to China to learn porcelain-making technology.