Yang Su was first and foremost a war god. It can be said that if Yang Jian had not had Yang Su, the founding of the Sui Dynasty would not have been so easy. Yang Su's path to success was accompanied by his military achievements and the growth of the Sui Empire.
Yang Su was undoubtedly a cunning and opportunistic courtier. According to the *Book of Sui*, he conspired with the Empress to eliminate other princes and install Prince Yang Guang as Crown Prince. He was involved in a secret plot to hasten Yang Jian's death and thwart his belated attempt to reinstate the former Crown Prince to replace Yang Guang. Despite his past embezzlement and abuse of labor, Yang Su was entrusted with the important task of building a new capital in Luoyang. However, his eventual fate seems less than ideal, per
