This symbol isn't only present in China, but is seen in all over eastern asian countries such as Japan, Korea, Tibet, Thailand, Burma, Vietnam, Sri Lanka, Nepal, Cambodia and Laos. The name of this Guardian Lion varies from these different countries, like in Japan, it is called Komainu, (Korean Dogs, due to its introduction to Japan from Korea).
We were inspired from the number 7 derived from the year 2017, and 777 is also a lucky number. The keyset was also inspired from the slot machine which can possibly bring you luck in this new year. With the sounds of 'kaching!' and a feeling of satisfaction from the clicks and clacks, it *may* make you the luckiest man alive, who knows!?