The Book of Songs describes the local customs of many places, among which Qin Gui and other folk songs of fifteen countries at that time were taken from Zheng's poems. According to the custom of the state of Zheng, every year in the middle of spring (exhibited on the third day of March), on this day, everyone gathers at the Qin River to offer sacrifices and pray for good luck, marriage and children. Young men and women enjoy a spring outing together. At that time, Zheng's social atmosphere was pure and men and women had sincere feelings. Although it is not as romantic as Tanabata or as direct as Western Valentine's Day, it has the innocence and simplicity of pursuing love under the social background at that time. Just like the dialogue between men and women in the poem, simple and pious.
Lotus root and spoon medicine are two kinds of flowers in the poem. Lotus root refers to blue grass, which is the predecessor of orchid now. It is one of the sacrificial props, burning bluegrass and conveying people's hope to the gods with its fragrance. The peony in men's and women's hands is a token of love and a symbol of affection. Jian Zheng said, "Another thing is to give women a spoonful of medicine to show their gratitude".