There are generally three ways to settle patent transfer fees: one-time settlement, commission, and a combination of fixed and commission. "One-time settlement" means that after signing the transfer contract, the licensee (transferee) pays the licensor (patentee) a one-time transfer fee according to the price specified in the contract. "Commission" is divided into two types: fixed commission and sliding commission. "Fixed commission" means that the production quantity or net sales of the contracted product is artificially fixed at a certain number (regardless of whether the actual production quantity or net sales is more or less) , and the commission will be based on this number every year within the commission limit; the "sliding commission" means the commission will be based on the actual number of products produced each year or the actual net sales. The "fixed" part of the "combination of fixed and commission" is called the initial payment, also called the "entry fee." This part of the fee must be paid immediately after the contract takes effect; the "commission" part must be paid within the number of years agreed in the contract after the project is put into production. Payment within the period is the same as "commission".