The Macau Special Administrative Region (Chinese: 澳門特別行政區; pinyin: Àomén Tèbié Xíngzhèngqū; Portuguese: Região Administrativa Especial de Macau; [abbreviated as: RAEM]), commonly known as Macau or Macao (simplified Chinese: 澳门; traditional Chinese: 澳門; pinyin: Àomén, or informally as 馬交 Mǎjiāo) is one of the two special administrative regions (SARs) of the China (PRC), along with Hong Kong.