This poem is one of the poems of Li Bai, a poet in the Tang Dynasty. "flying together" means that two birds fly together, regardless of north and south; "Old wings have been hot and cold several times" refers to how many years these two birds have flown and how many spring, summer, autumn and winter they have experienced. This poem depicts two birds flying together, expressing a loyal, firm and never-ending love and friendship, which can never be separated even after years of baptism. This poem is also often used to describe the deep feelings between two people, which have stood the test of time and test and remain the same.