Unlike those of the fire breathing, knight battling ilk, the Chinese dragon is a symbol of prosperity and nobility. When paired with the benevolent phoenix, he is a symbol of austerity. So the Chinese saying goes: "When the dragon soars and the phoenix dances, the people will enjoy happiness for years, bringing peace and tranquility to all under heaven." The same should surely happen upon receiving this charming note card in the post.
Your Thank You Notes should reflect your aesthetic, whether it's classic, romantic, minimalist or modern. The recipient of said note should know who it's from even before he/she reads a word.