The Legend of the White Snake was one of the classics of ancient Chinese literature. The following is a seven-character quatrain about it: The Legend of the White Snake has been passed down through the ages The green snake and the white snake were still in love. Turn into a butterfly and fly away to grow wings turning into a bird, I fly to accompany a pool. This poem described the story of the two main characters in the Legend of the White Snake, the White Snake and the Green Snake, as well as the deep feelings between them. The poem used the phrase " butterfly flying away to give birth to wings, bird flying to accompany a pool " to describe the love between the white snake and the green snake. It expressed their feelings of supporting each other in life and death and never leaving each other.