induct
verb [ T ] formal uk/ɪnˈdʌkt/ us/ɪnˈdʌkt/
使正式就任;正式吸收…为会员;使入门;传授
to introduce someone formally or with a special ceremony to an organization or group, or to beliefs or ideas
Li Xiannian was inducted into the Politburo in 1956. 李先念于1956年进入政治局。