Legal basis: Article 846 of the General Principles of the Civil Law of People's Republic of China (PRC) stipulates that the payment method of the price, remuneration or use fee of a technology contract shall be agreed by the parties, which may be one-time payment or one-time installment payment, or royalty payment or extra advance entry fee. Where it is agreed to pay the royalties, the royalties may be calculated according to a certain proportion of the product price, new output value, profit or product sales after the patent is implemented and the technical secrets are used, or by other agreed means. The proportion of royalty payment can be fixed, increasing year by year or decreasing year by year. If the use fee is agreed, the parties may agree on the method of consulting the relevant accounting accounts.