China, that is to say mainland China has threatened to take Taiwan by force. But history shows that it is mainland China that is the renegade part of the Republic of China, Taiwan or Formosa, not that Taiwan “belongs” to Communist China. According to Wikipedia’s entry on Taiwan: “The Republic of China, which had overthrown the Qing …
A currency can be anything. In primitive societies it can be cowrie shells, in prison it can be cigarettes. What matters it that other people will accept it at a known value. In the west we use pounds, dollars, euros etc. We can easily buy stuff with cash, a credit or debit card or check …