National Congress of Argentina sessions span is from March 1 to November 30; the President of Argentina is entitled to convene extraordinary sessions during the recess, if needed. Senators and deputies enjoy parliamentary immunity during their mandates, which may be revoked by their peers if a senator or deputy is caught "in flagrante", in the midst of committing a crime. The Congress is in charge of setting taxes and customs, which must be uniform across the country. It rules the Central Bank of Argentina, manages internal and external debt payment, and the value of national currency (currently the Argentine peso). It rules the legal
History of Chinese currency base unit of currency remained the copper coin. Copper coins were used as the chief denomination of currency in China until the introduction of the yuan in the late 19th century. Currently, the "renminbi" is the official currency of the People's Republic of China (PRC). It is the legal tender in mainland China, but not in Hong Kong or Macau. The special administrative regions of Hong Kong and Macau use the Hong Kong dollar and the Macanese pataca, respectively. The use of shell money is attested to in the Chinese writing system. The traditional characters for 'goods' (), 'buy/sell' (),