(b) A period of not less than four months has expired from the date on which the service of the writ or other documents instituting a proceeding has been effected or deemed to have been effected in accordance with article 20, paragraphs 1 and 2; and
(b) 从按照第21条第1和第2款送达传票或其他起诉文书之日算起、或认为已送达之日算起至少已经四个月；并且