This poem was written to a pair of sisters Ye and Cha Xiang in the local Yuhua Village. They were deeply moved and decided to carve this poem on a stone as a souvenir. But they found that the stone was too hard to carve, so they drank their own blood and painted it on the stone, meaning to dedicate this poem with their own lives. Legend has it that this stone later drifted to the shore of Erhai Lake and became the "blood stone" of Cangshan Snow Erhai Moon.
Another version of the legend is that in the Tang Dynasty, a poet named Yang Shen wrote at the top of Cangshan Mountain, "The snow-capped mountains are full of moonlight and Cangshan Mountain, and the lonely waves on earth are terrible, and the personnel are clear and muddy, and there are several Cangshan springs in his chest." This poem. Legend has it that Yang Shen visited Dali, saw Cangshan Mountain and Erhai Lake along the way, and wrote this famous poem. This poem was introduced to people and told by many people who love natural scenery. At first, they were all attracted by the beautiful scenery of Cangshan Mountain and Erhai Lake, and they were amazed. They felt that this landscape was unique.