 Li Huaiguang, believing that the announcement was against him, further prepared for rebellion.Emperor Dezong, meanwhile, tried to calm Li Huaiguang by sending the official Li Bian () to award him with the title of "Taiwei" (太尉, one of the Three Excellencies) and an iron certificate (鐵劵, "Tiejuan"), which promised that he would never be executed.Li Huaiguang, believing that these were actually signs of distrust, threw the iron certificate onto the ground and stated