Some say it refers to the friend whom the author misses, or the "person who saw him off"; Shen Deqian said: "The moon is between the Three Gorges of Qingxi River, and half of the moon is no longer visible. The character Jun is Refers to the moon." ("Tang Shi Bie Cai") It seems that the latter view is more reasonable. Mount Emei is the author’s actual hometown, and the moon is the circle of my hometown. The author misses the moon of Mount Emei. Undoubtedly, it is also an attachment to my hometown. If "Sijun" is interpreted as "Thinking of friends", it would be too straightforward. It would be better to think of it as personification of the moon, which is more poetic. Yu Biyun believes: "The waning moon of the autumn night reflects the green and steep Mount Emei. The river stops and the scenery is secluded. The boat sails at night and heads east to Chongqing. Looking back at the setting moon and sinking into the mountains, I miss you, but there are beautiful mountains across the way. It's like good friends share the same love." ("Continuation of a Brief Introduction to Poetry") Therefore, "missing you" does not just refer to missing a certain friend, but a broad sense of nostalgia.
Isn’t it more meaningful to be friends with the mountain and moon that symbolizes my hometown than to refer to a specific friend?