Risk assessment is needed. According to Article 25 of the Guidelines for the Implementation of Appropriate Management of Investors in Fund Raising Institutions (Trial), if a fund raising institution classifies professional investors in detail, it shall provide investors with a risk assessment questionnaire to evaluate the investment knowledge, investment experience and risk preference of professional investors and obtain the corresponding risk level. The Implementation Guidelines for Appropriate Management of Fund Raising Institutional Investors (Trial) does not specify the relevant contents of the cooling-off period, and the provisions of the cooling-off period shall be subject to the Measures for the Administration of Private Fund Raising.