(2) The poem depicts the images of birds that come and go, such as magpies and swallows, who nest on wood, are content with mediocrity and only seek self-interest, which is in sharp contrast with the image of Jingwei who is not afraid of difficulties and is determined to fill the sea, further embodying the greatness of Jingwei and expressing the author's firm will, perseverance and dedication to the ideal. (That's right)