How to express Li Bai's thoughts and feelings when seeing friends off?

This is a farewell song. But this poem expresses Li Bai's feelings of parting with his friends through the description of the parting environment. Between the green mountains and green waters, the author and his friends walk side by side, full of affection. This time, as soon as we left, our friends danced with the wind like grass, but Wan Li fell. I don't know when I can see you again. "I will think of you in the clouds, so I will think of me in the sunset" is a description of friends' erratic whereabouts and their reluctant feelings for friends. Metaphorically, floating clouds and sunset also have human feelings. The last sentence "and my horse is neighing again and again" adds to the melancholy at other times. The whole poem is full of sound and emotion, with lively rhythm and sincere, enthusiastic and optimistic feelings. Although it is sad to leave, it is not discouraging and decadent.