1. From the perspective of imagery, natural pictures such as spring breeze, summer rain, autumn frost and winter snow appear in the poem. These pictures represent the passage of friendship with time and also symbolize the lasting friendship.
2. A large number of poultry animals such as egrets, oak trees, and geese appear in the poem. These animals can represent the natural depth and unimpededness of friendship, and also symbolize kindness and courage.
3. From a thematic point of view, the poem expresses a sincere and deep friendship. It also emphasizes that no matter how long it takes, friendship can last forever. The trust and trust that overflows from friendship, Care and support reflect the theme of deep friendship.