This set contains three gold coins issued as part of the Lunar Series II range of coins to mark the 2017 Chinese Year of the Rooster (28 January 2017 - 15 February 2018).
The Mint says about it:
In 2017, we celebrate the tenth animal in the 12-year cycle of the Chinese zodiac. The birth dates for people ruled by the Chinese Lunar rooster include 1921, 1933, 1945, 1957, 1969, 1981, 1993, 2005, and 2017. Those born under the influence of this sign are said to be hardworking, loyal, honest, and sociable.
The reverse of each coin depicts a rooster standing in a stylised Chinese scene featuring bamboo and leaves. The Chinese character for "rooster" and the inscription "Year of the Rooster" also appear in the design with The Perth Mint’s traditional "P" mintmark.