Events such as Roblox’s listing on the New York Stock Exchange in March 2021 and Facebook’s change of name to Meta （the first 4 letters of metaverse） in the same year marked the beginning of the first year of business in metaverse，making metaverse one of the hottest keywords of 2021.Technology giants are laying out the metaverse by developing key technologies such as 3D modeling，mixed reality，digital twins and computing power networks，continuing to expand the metaverse track.Technology giants such as Roblox，Facebook，Nvidia，Google and Bytedance are making full use of their advantages to expand in hardware，technology，products，content，ecological construction and other fields related to the metaverse.