Yan Hengjian

It is said that before his death, Chang Yuchun, King of Kaiping, recorded his lifelong martial arts in a book, hired skilled craftsmen to build a unique magic weapon, and secretly handed these two to Zhu Yuanzhang to protect the Ming Dynasty. In the fourth year of Jianwen in the Ming Dynasty, King Zhu Di of Yan was in trouble. The army invaded the capital. Emperor Jianwen's whereabouts were unknown. Along with him, the martial arts and magic weapons left by King Kaiping disappeared with him. Since then, rumors about the secret treasure of King Kaiping have spread in the world, causing various martial arts factions to fight for it, and the world is in turmoil.