When those red berries come in spring, what is expressed in Acacia's poems?

When those red berries come in spring "comes from Wang Wei's A Gift from the River to Li Guinian". Red beans are produced in the south. They are strong, bright red and round, as crystal clear as coral. Southerners often use them as decorations. Legend has it that there was a woman in ancient times, because her husband died by the side and cried under the tree and turned into red beans, so people called her "Xiangsisi".