该接口用于查询指定证券账号的风险测评信息及专业投资人(PI)认证信息。通过传入证券账号 account_no,返回用户是否为专业投资人 is_pi、PI 过期时间, 以及风险测评等级(A1-A5)、测评得分和适用产品类型等信息。This interface is used to retrieve the risk assessment information and Professional Investor (PI) certification details for a specified securities account. By providing the account number account_no, it returns whether the user is a professional investor is_pi, the PI expiration time, as well as the risk assessment level (A1-A5), assessment score, and applicable product type.