刘勰在《文心雕龙·知音》中，无论是论鉴赏还是论批评，他都十分关注接受主体，并非常重视接受主体──读者的关键作用。为了纠正不良的心理偏向，刘勰提出了接受主体必备的条件──“博观”，即“操千曲而后晓音，观千剑而后识器”。 In the Literary Mind and the Carving of Dragons · Knowing the Voice, Liu Xie paid much attention to the subject of acceptance, both in terms of appreciation and criticism, and attached great importance to the acceptance of the subject as the key role of the reader. In order to correct the bad psychological bias, Liu Xun proposed to accept the necessary conditions for the main body ─ ─ “Bo concept”, that is, “practice the trilogy and then know the sound, view the sword and then device.”