Laozi said: teaching without words is the benefit of inaction. Inaction is beneficial, inaction can achieve the effect of inaction, and silence is a manifestation of inaction. Inaction and silence in language expression can also achieve the effect of words, but inaction is not inaction. Inaction is only a formal omission, but it is actually promising. Laozi's silence is not wordless, but wordless, witty and Miao Yan. Lao Tzu pays attention to the effect of words. He has something to say, nothing to say, and nothing to exclude superfluous words.