How to judge the quality of a classical poem?

Originally, my opinion was that there was no specific standard for evaluating the quality of a poem, but since reading Mr. Ye Jiaying's article, I have changed my opinion: the standard of China's classical poetry is moving. As "Preface to Mao Poetry" said: Emotion moves in the middle, in the words. Only by touching the heart first, and then expressing it in words, is this the process of literary creation, otherwise, it is just a mechanical and blunt word game. Seeing mountains is mountains, and seeing water is water. This is the first realm. At this time, the creators did not have the ability to create independently, so their poems were not good poems, let alone poems. Seeing mountains is not mountains, and seeing water is not water. This is the second realm. At this time, the poetry creators seem to have opened the second pulse of Ren Du, the level of creation has advanced by leaps and bounds, and poetry works have begun to enter the polishing stage, at least looking radiant; When we reach the third realm, whether we look at mountains or mountains, water or water, the poetry works at this time can be regarded as excellent works. They are no longer just the piling up of words or showing off some writing skills, but the natural expression of feelings, which is the most vital art.