Wikipedia says, "Why do you always have tears in your eyes, because you love this land deeply?" It comes from the modern poet Ai Qing's I Love this land. This is a poem written in the period of War of Resistance against Japanese Aggression from 65438 to 0938, which expresses the poet's love for the motherland and strong hatred for the invaders. This poem begins with "If I were a Bird", which describes a bird singing with a hoarse throat. Then it describes "the land hit by the storm", "the river of sadness and anger will surge on us forever", "the angry wind blows endlessly" and "the incomparable gentle dawn from the forest". Then the poet said, "Then I died, and even my feathers rotted in the ground." It shows the poet's loyalty and sacrifice to the motherland, and also implies the life-and-death crisis faced by the people of China at that time. Finally, the poet changed from the image of a bird to himself and said the classic sentence: "Why do I always have tears in my eyes?" Because I love this land deeply. "It not only expresses the poet's sympathy and sorrow for the suffering and fate of the motherland, but also expresses the poet's ardent expectation and firm belief in the future and bright future of the motherland.