How did Yang Guang become a prince and how did he ascend to the throne? Tell me about his life's merits and demerits.

Pretend to be honest, lewd, frugal, obedient and filial. Do whatever you want (emperor and queen)

Merits: the construction of the Beijing-Hangzhou Grand Canal and Luoyang City, the eastern capital, the smooth flow of the Silk Road, the promotion of large-scale construction, the creation of the imperial examination, and the personal recruitment of Tuguhun; Tong: Three Koryo Signs. Don't look at the romance of Sui and Tang Dynasties, that thing spits a lot. Emperor Wendi of Sui played with women after the death of Queen Dugu, so he played himself to death.

To tell the truth, Yang Guang's personality is too impatient. If he can take things one by one (imperial examination, canal, reunification) slowly, he can definitely compare with Qin Shihuang's achievements. But he put these three things together and brought down a country in this way. The imperial examination made him lose the influence of the aristocratic family. The canal and the battle made him lose his heart. These three things are a waste, and no amount of money can last. Enjoyment is another kind of love.