The Regional flag of the Macau Special Administrative Region of the People’s Republic of China is light green with a lotus flower above the stylised Governor Nobre de Carvalho Bridge and water in white, beneath an arc of five gold, five-pointed stars: one large in the centre of the arc and four smaller ones.
The lotus on the flag was chosen as the floral emblem of Macau. The Governor Nobre de Carvalho Bridge is a bridge linking the Macau Peninsula and the island of Taipa. The bridge is one of the most recognisable landmarks for the territory. The water beneath the lotus and the bridge symbolise Macau’s position as a port and its role played in the territory. The five five-pointed stars echo the design of the flag of the People’s Republic of China, symbolising the relationship Macau has with its sovereign state.
According to the Basic Law of Macau, the Macau Region Flag is a green flag with five stars, lotus flower, bridge and sea water. This law also adopted “Apart from displaying the Flag of the People’s Republic of China, the Macao Special Administrative Region may also use a regional flag”. Wikipedia