It is said that Yang Guang is a emperor, but Yang Guangkai keju, repairing canals, and marching on Goryeo, which thing is like a dusk jun? Yang Guang's defeat was defeated by being too diligent in government, and the three conquests of Goryeo and the construction of canals were engaged in labor and loss of wealth. From the perspective of the impact on future generations, the influence of Yang Guang's repair of the canal and the opening of the imperial examination is still valid today. On the contrary, Li Shimin, who is known as the Emperor of the Ages, has basically made no contribution to future generations.
