formally known as Crown Prince Wei (衛太子) and posthumously as Crown Prince Li (戾太子, literally "the Unrepentant Crown Prince", where Li is an unflattering name) was a Western Han Dynasty crown prince. He was the eldest son and the heir apparent to his father, Emperor Wu of Han, until his death at age 38 during the political turmoil that occurred during 91 BC. In the same year, Jiang Chong and Su Wen decided to move against Liu Ju, once again using witchcraft as an excuse. Jiang, with the approval of Emperor Wu, searched through various palaces, ostensibly for witchcraft items, eventually reaching Empress Wei and Liu Ju's household. Jiang's men dug holes everywhere, leaving barely room for the Empress and Crown Prince to lay their beds. Jiang Chong then planted dolls and pieces of cloth with mysterious writing in Liu Ju's palace, and then announced that he found evidence of witchcraft. Liu Ju, initially believing that he had nothing to hide, was shocked and forced to consider his options, and his teacher Shi De (石德), invoking the story of Zhao Gao's plot to murder Ying Fusu and raising the possibility that Emperor Wu might already be deceased, suggested that Liu Ju should start an uprising to remove Jiang. Liu Ju initially hesitated and wanted to speedily proceed to Ganquan Palace and explain himself to his father, but he found out that Jiang's messengers were already on their way to report the "crime". So he decided to accept Shi's suggestion.