The historic overthrows of the Xia and Shang dynasties; specifically, the overthrow of the Xia tyrant [[桀|桀|jie2]] by King [[商汤|商湯|shang1 tang1]] and the overthrow of the Shang tyrant [[纣|紂|zhou4]] by King [[周武王|周武王|zhou1 wu3 wang2]].