Neutral Dollar (NUSD) is a basket of Exponential stability currencies initially composed of USDC, PAX, TUSD and DAI. Through Taifang smart contract, it realizes 100% pledge of component Stablecoin and allows free exchange between them. In the future, it can add more mainstream Stablecoin into the pledge pool at any time according to market demand. The index product design enables it to effectively open up the cross platform liquidity between Stablecoin components. Compared with other single Stablecoin, it has significant advantages in arbitrage transactions, risk hedging and investment pricing, and helps users reduce the volatility of Stablecoin as a pricing tool and the risk of acceptance diversification....