In 6 18 AD, that is, in March of the 14th year of Yang Di's accession to the throne, the guard elected Yu Wenhuaji, the son of Yuwen Shu, as the leader and launched a mutiny. Emperor Yang Di was finally strangled at the age of 50. Later, posthumous title was "Yang-ti", the lowest and the worst. Sui Wendi Sui Wendi, who originally seized the throne in the Northern Zhou Dynasty, was finally killed by his son. History has turned a small circle here. However, the throne did not pass back, but came to Li's side, and history evolved into the Tang Dynasty.