Discounting bills means that the demander requires the bank or discount company to convert the unexpired commercial bills, bank acceptance bills or short-term bonds into cash, and the bank or discount company (financing company) receives these unexpired bills or short-term bonds, deducts the interest after discount according to the par value, pays cash, and then collects money from the drawer when the bills expire. Therefore, for ticket holders, discounting is an act of selling bills that have not expired at the end of the period to banks to obtain liquidity, so as to recover the capital prepaid to commercial credit in advance. For banks or discount companies, discount is a loan business combined with commercial credit.