Emperor Xuan died in 580, and Empress Yang's father Yang Jian became regent. Three of Emperor Xuan's empresses, other than Empresses Yang and Zhu, became Buddhist nuns, but Empress Zhu did not at this point, and was honored as empress dowager (along with Empress Yang) but with the secondary title of Di Taihou (帝太后), lower than Empress Dowager Yang's title of Huang Taihou (皇太后).
Emperor Xuan passed away in 580, and Empress Yang's father Yang Jian took over as regent. Three of Emperor Xuan's empresses, apart from Empresses Yang and Zhu, became Buddhist nuns, but Empress Zhu did not at that time, and was honored as empress dowager (along with Empress Yang) but with the secondary title of Di Taihou (Empress of Great Ceremonial Rites), lower than Empress Dowager Yang's title of Huang Taihou (Empress of Supreme Ceremonial Rites).