In summer 604, Emperor Wen, while visiting his vacation palace Renshou Palace (仁壽宮, in modern Baoji, Shaanxi), grew gravely ill.

Later in 342, Emperor Cheng grew gravely ill.

Around the new year 400, Lü Guang grew gravely ill, and he ordered Lü Shao to take the throne and the title Heavenly Prince; he himself claimed the title of retired emperor.

In summer 342, Emperor Cheng grew gravely ill.

In 773, Linghu grew gravely ill.

However, when Zhang Chonghua grew gravely ill in 353, he tried to recall Xie to be regent for his son and heir Zhang Yaoling.

By the time Huan Wen grew gravely ill in 373, Huan Wen was effectively in direct control of the western two thirds of the empire.

Late in the year, however, the young emperor grew gravely ill, and eunuchs loyal to Prince Bao, led by Sun Cheng (孫程), formed a conspiracy to overthrow the Yans.

In 888, by which time Huang's rebellion had been crushed and the imperial court had returned to Chang'an, Emperor Xizong grew gravely ill.

Then her face grew gravely serious.