In 1992, Neil Stephenson proposed the concept of "MetaVerse" in his science fiction novel "Avalanche": In the metaverse, people can have their own virtual doubles. Nearly 30 years have passed, with the development of new technologies such as AI (artificial intelligence) technology, VR (virtual reality) technology, and AR (augmented reality) technology, people find that the plot described in "Avalanche" is no longer so illusory. In 2021, Zuckerberg will rename Facebook to "Meta," the prefix fo...