As the youngest daughter of Li Shimin and Empress Zhangsun, the twin sister of Princess Jinyang, Li Jingyun suddenly obtained an infrastructure system. 　　The system is so strange; it keeps giving Jingyun inexplicable things. 　　Black, grimy gray mud—Jingyun doesn’t like it, but it can be exchanged with her mother for elixirs? Fine, take it! 　　Fragrant, glutinous sweet potato chunks—delicious! Must give a piece to Father! 　　The brothers quarrel every day? Jingyun quietly slips them a little "New Year picture" and, cooing like a baby, says, "Brothers, stop fighting. These are all for you; they can be exchanged for very large fiefs!" 　　…… 　　One day the Tang suddenly has cement; building city walls no longer requires hauling huge stones, 　　The common people have maize, sweet potatoes, and Champa rice; no one will starve again, 　　And the princes who had been prepared to fight to the death for the throne now hold maps of lands said to be overseas and sail westward to fertile, unclaimed territories…… 　　And the little contributors to all this are holding watermelons and whispering anxiously to their sister: "Sister, we’ll have to eat a bit more sparingly from now on." 　　"Huh?" 　　"Father is so poor now—he keeps picking up the junk I don't want!" 　　Li Shimin, hiding behind a tree, feels complicated: Little one, the things you throw away aren't junk—they're treasures given by the immortals! 　　[This is a Tang-dynasty historical fanfic. Thanks for the love~]