Polyspermic plants like gourd, pumpkin, grape, are symbols of propagation.In art works, their function of producing seeds
is what it matters. Therefore, in spite that the seeds can not be seen from the outside, they are still being drawn. The seeds were metaphorical of the children that were conceived by the uterus (In the form of a gourda pumpkin and grape) of mother's body. Original Chinese philosophy defines the basic characteristics of Chinese folk art. Likewise, "Rat eating pumpkin;" "Rat eating grape;" are of the same implication.
