At the meeting of the title review committee, Professor Zhang objected to his suggestions on "opposing the promotion of Li Hua to a professor who seriously violated the school discipline and rules," and he felt very sorry and did not understand it, and then hesitated Exited the conference room. What attitude did Professor Zhang hold towards Professor Li Hua's promotion? ['Agree.', 'Disagree.', 'Not available.', 'Ignore.']