In 756 ad, Tang suzong in behind the eunuch Li Fuguo ascended the throne of planning. However, be a law onto oneself, controlled the power of Li Fuguo not to Jiangshan sajik is heavy, but secretly colluded with much grace and concubine Zhang Liangdi suzong, want to feast in Jianning palace, Prince Li Chu was murdered, and the opportunity to blame Yu Jianning, Wang Litan.