During Emperor Suzong's reign, the tradition of eunuchs becoming top-ranked officials began, with Li Fuguo becoming the commander of the imperial guards and possessing nearly absolute power near Emperor Suzong's reign. In 762, with Emperor Suzong gravely ill, Li Fuguo killed Emperor Suzong's wife Empress Zhang in a power struggle and shortly after that, Emperor Suzong died of myocardial infarction. He was succeeded by his son Emperor Daizong, who was eventually able to kill Li Fuguo, but the tradition of eunuchs in power had started. Suzong's death on 16 May came only 13 days after the death of his father, the Emperor Xuanzong.