The red beans in the poem "When those red berries come in spring, they blush on your southern branches" refers to sea beans. Legend has it that there was a young woman in ancient times who died in frontier fortress because of missing her husband. She leaned against the tree in front of the door and cried day and night until her tears dried up. Her eyes shed blood, and the blood and tears dyed her roots red, so she produced red beans with the meaning of acacia. The characteristics of red beans: hard as diamonds, bright as blood, like a beating heart, red and shiny, not decaying, crystal clear and never fading. Its shape and texture are "heart-shaped". Be careful of your big heart and your soul mate. Because people who suffer from lovesickness, under the tree of tears, are difficult to resolve and eventually condense.