Please summarize the image characteristics of lotus picking girls in lotus picking songs.

This poem is about a girl who picks lotus, but there is no positive description. Instead, the lotus leaf is green as a skirt, the lotus flower is red as a face, and no one can hear the singing, which skillfully blends the beauty and nature of a lotus picking girl. The whole poem is lively, poetic and full of life interest. The first two sentences of the poem make people feel that these lotus-picking girls are simply a part of beautiful nature; The last two sentences are about people standing together and gazing at each other for an instant. The first two sentences focus on objective description, while the last two sentences focus on subjective feelings. The combination of objective description and subjective feelings well shows the beautiful artistic conception that people can't compete with each other.