South Korea and China's virtual currency
exchange rate calculation http://tw.stock.yahoo.com/d/c/ex.php
1 yuan = 120.775337 won
1 000 won = 8.30611225 yuan
the exchange rate on January 31 of 2006 was 131.3020 yuan, that is, the exchange rate of 100 yuan was 13130.2 won
that is 1:129
100 won = 0.7407 yuan
1 yuan = 135 won.
1 won = 0.006023 yuan
if you want to go to Korea to exchange won, you can exchange it at Korean airport.
if you have won to exchange it into RMB, you need to exchange it at Korea Youli bank in Pudong,
other banks can't provide the service of exchanging won, you can also exchange it with scalper
take the foreign exchange rate on January 23, 2020 as an example, 10000 won is about 59.25 yuan when South Korea was founded, its currency value was issued with reference to Japanese yen. From 1 yuan to 10000 yuan. Later, after nearly 60 years of South Korea's economic take-off, South Korea's economic prosperity created today's high value of the won
There are two kinds of Korean currency: paper currency and coin. There are four kinds of banknotes: 1000 won, 5000 won, 10000 won and 50000 won, which are easy to distinguish according to the historical figures and colors printed on the banknotes 
extended information:
after opening the two-way exchange business of Korean won banknotes, Bank of China will provide residents and non residents with the service of exchanging Korean won banknotes into RMB banknotes
when exchanging, you need to provide your own valid ID card. However, only non resident indivials are provided with the service of converting RMB cash back into Korean won cash. Moreover, domestic banks can not provide Korean won foreign exchange purchasing business for the time being. For personal business, business trip or travel to Korea, you can first purchase foreign exchange dollars in RMB, and then exchange them into Korean won