identical
In Chinese, Pinyin is bi é w ú è RZH ì, which means that we can't distinguish the two. It comes from Guo Moruo's Haitao collection xujiabu.
The origin of Idioms
Guo Moruo's haitaoji xujiabu: "the scenery in Jiangxi is peaceful and plain. It's the same as the scenery along the Yangtze River."
Idiom usage
It means exactly the same
identical
Craftsmen carry gold with stone - jiàng shí yùn jīn