Since it is mentioned in A that C does not ask B for the agency authority, it means that it is not known whether C has the agency authority in the end, and it is mentioned in A that B is acting on its own initiative in the name of A, and there is no evidence to make people believe that B can represent A, so it does not meet the conditions of agency by estoppel; B, A has a blank contract, which can be used as a reason to convince the counterpart that the actor has the right of agency, so B is chosen.