According to historical records, in 208 BC, King Tiansu exchanged protons with Emperor Huai of Chu and promised eternal friendship between the two countries. However, the good times did not last long. Three years later, Emperor Huai let Tiansu's son Murong Jing return to his country and took back the crown prince Chu Min. Soon after Emperor Huai died, Emperor Min of Chu succeeded to the throne and sent troops to attack Tiansu together with Qi. Tiansu was divided into three parts. After the war, Emperor Min of Chu was determined to rectify the Chu state, establish new laws, and open up new territories. He died in 256 BC at the age of sixty-five. He was a virtuous king in the Four Realms period, but he was not buried in the cemetery after his death, and future generations could not pay tribute to him. So where is he buried? Because there are no subsequent records in history books, modern archaeologists cannot solve this mystery.