孝圣宪

xiào shèng xiàn

Empress Xiaoshengxian (1693-1777), consort of Emperor Yongzheng 雍正[Yong1 zheng4] and mother of Emperor Qianlong 乾隆[Qian2 long2]

xiào

filial piety or obedience

shèng

(bound form) peerless (in wisdom, moral virtue, skill etc)

xiàn

statute