云消雾散

yún xiāo wù sàn

the clouds melt and the mists disperse (idiom)

to clear up; to vanish into thin air

云

yún

abbr. for Yunnan Province 雲南省|云南省[Yun2 nan2 Sheng3]

消

xiāo

to diminish; to subside

雾

wù

fog

散

sàn

to scatter