This is the 18458th most frequent Russian word.
юань
"Юань" is the Russian word for "yuan," the currency of China.
The word 'юани' refers to the Chinese currency in plural form to indicate the amount exchanged.
Он обменял сто долларов на юани.
He exchanged one hundred dollars for yuan.
Here, 'юаня' is in the genitive case, referring to the currency and its value.
Курс юаня сегодня повысился.
The exchange rate of the yuan increased today.
'в юанях' is the locative case, showing the currency context in which prices are displayed.