The modern soul traveled through time and became Li Yuanying, the younger brother of Emperor Taizong of the Tang Dynasty and a notorious naughty child. In order to complete the system's tasks, he frantically "got things done" during the Zhenguan years - setting up a vernacular school to teach the emperor, opening a free medical clinic for Sun Simiao, improving papermaking and printing, building a public library, and also recruited a group of "little brothers": the seven-year-old Di Renjie, Wu Mei from the Yeting Palace, the homeless boy Su Dingfang, and the accounting genius Tang Juan. While he felt sorry for the emperor's brother who stayed up late and worked overtime, he used sunflowers, loudspeakers, and joint-stock caravans to turn the Tang Dynasty upside down, making Li Tai impeached many times. Finally, the Tengwang Pavilion was completed, and old friends gathered by the river, only to see an unknown giant ship approaching from the distant sea... This is an ancient version of "The Diary of a Naughty Boy", using relaxed and humorous writing, through the eyes of a "Xian Wang", to show the prosperous Tang Dynasty full of human touch and life.
