The crime of illegally absorbing public deposits refers to the act of illegally absorbing public deposits or absorbing public deposits in disguise, which disrupts the financial order. "Illegal" includes two situations: the subject is illegal and the way is illegal. First, the actor does not have the legal qualification to absorb public deposits, such as private banks, money houses, private banks and savings offices of enterprises and institutions, etc., and illegally handles deposit and loan business to absorb public deposits; The other is that although the actor has the legal qualification to absorb public deposits, he takes illegal measures to absorb public deposits. For example, in order to win customers, some commercial banks and credit cooperatives raise interest rates or pay interest first when making deposits. In the stem of the question, A's behavior is illegal.