The volatility of existing cryptocurrencies significantly undermines their liquidity. If cryptocurrencies had a stable value, they could potentially be more widely used as a store of value, medium of exchange, means of payment, and payment standard. The FLAT project is precisely this kind of ideal stable cryptocurrency. By being pegged to fiat currency, connected to various issued tokens in the form of unified collateral assets, it forms a decentralized and stable ecosystem balanced by supply and demand. The systems actual collateral value will be maintained at 100% or higher.