A large number of jade tablets containing alliance oaths were found at the Houma Jin Kingdom site in Shanxi Province, which are called "Houma Alliance Books", also known as "Zaishu". Books, mostly ink books. His calligraphy is sharp and concise, with regular strokes and strokes, stretching and rhythm.
It witnessed the participation of Zhao Yang of the Jin State at the end of the Spring and Autumn Period in a political struggle within the Jin State from the internal strife of six ministers to the coexistence of four ministers. It was this struggle that marked the beginning of the Warring States Period. The prelude to the major event of "three families being divided into Jin".