He transmigrated into the Tang Dynasty as the Seventh Prince, Li Yun, and was given a fief in Jiaozhou, Lingnan.
Other transmigrators: farm, invent things, gather followers, become emperor.
Li Yun after transmigrating: lie flat, complain about being poor, build roads, collect tolls.
"Father, the people of Lingnan are suffering!"
"Father, Your son can't sleep a wink all night!"
"Father, if you have some free time, come see Lingnan..."
Li Shimin read the memorials and felt so sorry for him that he sent silver year after year.
Li Yun took the money and put it toward building roads, constructing a port, developing trade, and opening free schools!
Five years later, Li Shimin traveled incognito to Lingnan. When he arrived, he saw that the concrete roads were smoother than Chang'an's, the city walls thicker than Chang'an's, Persian merchant ships filled the harbor, and smiles adorned the people's faces.
Li Shimin: "You call this 'the people are suffering'?!"
There is nothing wrong with fictional novels. Empress Changsun died in the 10th year of Zhenguan, but this novel is still alive in the 12th year of Zhenguan.