entertain an angel unawares
Don't know Mount Tai, Chinese idiom, Pinyin is B ù sh í t à sh ā n, meaning don't know Mount Tai, analogy to see and hear too narrow, can't recognize high status or ability. From the water margin.
The origin of Idioms
Shi Naian of Ming Dynasty wrote the second chapter of the whole story of the Water Margin: "master is so strong that he must be a teacher. Children have eyes and don't know Mount Tai. "
Idiom usage
As predicate, object, attribute; used in life. Please forgive me for my blindness.
entertain an angel unawares
Go to the East and go to the West - dōng zhēng xī tǎo
human feeling is like running water - liú shuǐ wú qíng
a pewter spearhead that shines like silver-an impressive looking but useless person - yín yàng là qiāng tóu
this election campaign has seen all the usual mud-slinging we have come to expect . / there has been a lot of political mudslinging in the battle for votes - è yì zhòng shāng