 The 9 sons of the dragon were recognized by the Chinese government's official Shanghai Mint in 2012's year of the Dragon by issuing 2 sets of coins, one in silver and one in brass.Each coin in the 9 coin sets depicts one of the 9 sons.A 10th additional coin was issued depicting the father dragon in silver and brass, which has iconography of the 9 sons on the reverse, for a total of 20 coins in the series.