According to the risk tolerance of ordinary investors and the risk grade of fund products, fundraising institutions should establish the following appropriate matching principles: ①C 1 type (including the category with the lowest risk tolerance) ordinary investors can buy R 1 grade fund products; ②C2 ordinary investors can buy fund products with R2 level and risk level below; ③C3 ordinary investors can buy fund products with risk level of R3 and below; ④C4 ordinary investors can buy fund products with a risk level of R4 and below; ⑤C5 Ordinary investors can buy fund products of all risk levels. Ordinary investors with the lowest risk tolerance shall not buy fund products higher than their risk tolerance.