ChainCatcher news, according to official sources, the ERC404 improvement protocol project LoongCity has announced the completion of a $2 million seed round financing, led by MAZARINE SEA.It is reported that LoongCity will launch the ERC1321 protocol based on the ERC404 protocol improvement, addressing the issue of the ERC404 protocol's inability to determine NFT rarity by introducing on-chain oracles. LoongCity is a fictional Chinese steampunk-themed metaverse, which will conduct its first NFT minting tomorrow, and will subsequently develop towards GameFi and the metaverse.