The distant nephew of Li Shimin, Emperor Taizong of the Tang Dynasty, was named the "King of Le'an" because his biological mother was of low birth and died young. Although he had the title of king, he had no real power. He developed a leisurely, indifferent, transparent and wise character since childhood. He had a hidden photographic memory and was proficient in miscellaneous studies (medicine, craftsmanship, and business). The background of the story is set in the middle period of Zhenguan. On the surface, the court is clear and clear, but in fact, it hides the struggle for the throne between the prince and the kings, and the game of interests between the nobles and the poor. Li Xian just wants to live a stable life in his little prince's palace, but he is repeatedly involved in turmoil, and finally finds a balance between "leisure" and "responsibility".
