It is the currency of the People's Republic of China to this day. The term yuan is also used in Taiwan.
Can you use Chinese yuan in Taiwan?
If you plan to exchange cash in Taiwan, the best rates are for US dollars, Euros, yen, or Hong Kong dollars, instead of RMB, though RMB is accepted.
What type of currency does Taiwan use?
The New Taiwan dollar (TWD) has been the currency used in Taiwan since 1949. New Taiwan dollar (TWD) only became a "national" currency in 2000, when the Central Bank of the Republic of China (Taiwan) took over its issuance from the Bank of Taiwan.