白云苍狗

bái yún cāng gǒu

lit. a white cloud transforms into what looks like a gray dog (idiom)

fig. the unpredictable changeability of the world

bái

white

yún

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

cāng

dark blue

gǒu

dog