What is the relationship among trustee, account manager, custodian and investment manager in enterprise annuity management? Can you describe the role orientation among the principal, trustee, account manager, custodian and investment manager of enterprise annuity in simple and understandable language? What do social security clients, trustees, account managers, custodians and investment managers do, and what is their relationship? A: The principal, trustee, account manager, custodian, investment manager and beneficiary are the parties to the enterprise annuity market. There is a trust relationship among the trustor, beneficiary and trustee, which shall be implemented in accordance with the Trust Law of People's Republic of China (PRC). Between the trustee and the account manager, between the trustee and the investment manager, between the trustee and the custodian, the trustee is a legal person agency relationship, which shall be implemented in accordance with the relevant provisions of the People's Republic of China (PRC) Contract Law.