Expansion: for a time, optimizing the financial structure and reducing the asset-liability ratio of statements have become the key issues to be considered when financing major state-owned enterprises. In fact, in order to reduce the asset-liability ratio of enterprises, a number of financial instruments have appeared in the market, such as off-balance-sheet ABS, perpetual bonds, consolidated funds, etc. Other products have adopted three-tier SPV (ABS for asset support special plan or ABN)- for property right trust)-investment limited partnership (this is a typical structure of consolidated funds for issuers in the past)-fund trust (granting trust loans to issuers).