The full name of NFT is Non-Fungible Token, a non-fungible token, which is unique and irreplaceable. The predecessor of its concept is “encrypted card”, which was proposed by senior cryptography expert and early Bitcoin contributor Hal Finney in 1993; and officially proposed by CryptoKitties founder & CTO Dieter Shirley in 2017; in a true sense It started to become popular when Christie’s auctioned NFT in March 2021, making NFT popular abroad and gradually spread to China​. With the hot of PF...