In the past few weeks, the concept of metaverse has continuously appeared in the public's field of vision and become one of the areas that people are most concerned about. But no one expected that metaverse and chain-games would impress us in such a rapid way, and become the leading sector of the market. At present, a large part of the enthusiasm in the crypto industry has concentrated on "GameFi". In the field of GameFi, a blockchain game called Axie Infinity became the vanguard of chain games.