It is derived from the surname Feng, an offspring of the ancient Fuxi . After the establishment of the Zhou Dynasty , King Zhou Wu destroyed the descendants of the previous sage king. Among them, the descendants of the ancient Fuxi were sealed in Su (now Dongping County, Shandong Province), and established the kingdom. The descendants of his ancestors then named the surname of the country and the surname . 2. In the post-Wei dynasty, there was a man named Liu Ziyi who was given Su as a result of his merits in post-Wei dynasty. 3. During the Northern Wei Dynasty, there were six Liujins who changed their surname to Su .
"Taiyuan Church": Su Cangshu was in the Han Dynasty. When he was 7 years old, he encountered a famine, and he was afraid that his parents would starve to death, so he asked his parents to sell him to the Wang family. The Wang family still gave him the last name. Later, Shucang Shu became the party eunuch and returned home to find his mother. When he passed the south corridor of Taiyuan, he happened to meet his mother, and then welcomed his mother.