含笑九泉 [- - jiǔ quán]smile in the underworld — one has nothing to regret in life; die with satisfaction; One would sink happily into the nether world.; sing Nunc Dimittis; smile in the underground; smile in one's grave：
•¶ 她倘得知， 当含笑九泉。 Had she heard the news， she would have smiled in her grave.