Datang: in the Beginning, He Remonstrated with Li Shimin and Became a Celebrity of the Day?

[Hello Mr. Jiang from the 21st century, I am an operator from the 30th century in the future] [First of all, I am very sorry. Due to the error of our staff, you have traveled to the fifteenth year of Zhenguan. You can choose to return at any time] [Method of return: Death by the emperor Li Shimin] [For this mistake, we will subsidize you in the form of winning a prize. The subsidy amount is one billion yuan. Please understand] Due to a system bug, Jiang Xu traveled to the Tang Dynasty by mistake, so when the system drew the big, round pie, he was getting further and further away from the road of seeking death...