1. Grass: Use the image of grass to express yearning for hometown and love for nature and life. For example, in the Tang Dynasty poet Han Cong's "Jiang Qing sends a friend in late spring", "The grass beside the Qinghe River in spring is not the time to look forward to hometown".
2. Dreams: Dreams are used to express feelings of missing hometown, dissatisfaction with reality and yearning for a better life. For example, in the poem "Hui Huan" by Li Yu, a poet in the Tang Dynasty, "The moon is like a hook without words. Lonely phoenix tree deep courtyard locks clear autumn. Cutting is still messy, which is parting from sorrow. Especially the general taste is in my heart. "