《太平广记·卷二百八十八·妖妄一》
武则天将药服下，自以为药力非凡，希望能活到传说中的彭祖那么大年龄，便改年号为久视元年。
则天服之，以为神妙，望与彭祖同寿，改元为久视元年。
Wu Zetian took the medicine, believing it to be extraordinarily potent and hoped that she could live as long as the legendary Peng Zu, so she changed the reign title to "Jiu Shi" (the first year of Jiu Shi).