XUSD is a Stablecoin that supports partial mortgage and has a novel stability mechanism. Unlike other over mortgaged or fully calculated Stablecoin, XUSD adopts a partial mortgage mode, that is, part of the supply of XUSD is supported by collateral. Part of the supply is controlled by algorithms, which makes XUSD capital efficient and truly stable.Capital efficiency: there will be no occurrence of over collateralizationStrong stability: partially supported by collateral pool assets, with low reflexivity, avoiding a 'death spiral'....