Traveling to the Tang Dynasty, Su Chen set up a stall selling roasted sweet potatoes. It is soft, glutinous and sweet, and the fragrance floats for ten miles, attracting the emperor to leave the palace incognito. "I will grant you the title of Guanglu Qing and serve as an official in the court!" Su Chen shook his head: "Your Majesty, being an official is hard, so it is better to sell sweet potatoes." The emperor called for you again and again, but he repeatedly refused. While others struggled to become officials, he only wanted to roast sweet potatoes. But the sweet potato stall grew bigger and bigger, and before he knew it, his influence had stirred up the entire Tang Dynasty!
