1. (1) It expresses the poet's strong longing for his loving mother.
? (2) "Don't lose heart" not only expresses the author's strong longing for his mother, but also expresses his persistent belief that his longing will be conveyed to his mother through the paper boat. Or: "Every day" not only makes people feel the number of folding paper boats, but also shows the author's lasting and strong longing for his mother.
2. Rabindranath Tagore, maternal love, innocence, nature