Hacash Diamond（HACD）， It is an innovative scarce cryptocurrency, also known as a new encrypted wealth warehouse, digital gold, digital identity, clearly owned Bitcoin, etc. Currently, there is no specific consensus definition formed. HACD is produced through bidding after mining, and each HACD has a unique ID consisting of six letters and a serial number, similar to the uniqueness of NFTs, but not simply NFTs. The long-term output cost of HACD increases with the increasing difficulty of mining, while the short-term output cost fluctuates with the market bidding heat. The maximum daily output is 58 pieces, and the final total does not exceed 16777216. The first six letters of HACD are NHMYYM and were produced on May 16, 2019....