云山雾罩

yún shān wù zhào

lit. enveloped in clouds and mist (idiom)

fig. (of speech or writing) unclear; confusing

yún

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

shān

mountain; hill (CL:座[zuo4])

fog

zhào

to cover; to spread over