Great Tang: Li Er Begs Me Not to Return to the Upper Realm

I transmigrated to the Tang Dynasty and became a little immortal? Li Er begs me not to leave! The refined salt I casually produce leaves the great clans trembling like leaves in the wind. When I bring out sweet potatoes yielding ten thousand catties per mu, Li Shimin offers to abdicate on the spot! The Turks invade? Easy. Just slip a little “something” into their salt. What? You say I’m ruthless? Sorry, when it comes to foreign tribes, Heaven won’t intervene!