After a grape is planted, although it is only a seed, it can grow into a string of fruits, full of all the grains, so it is endowed with many meanings:
1, which means "a million dollars", is easy to understand. Planting a tree will grow tens of millions, which means that a small amount of investment will yield benefits.
2, meaning "many children are blessed", and the population is prosperous, which can also be understood as a beautiful meaning such as successors.
3, meaning "fruitful", we see that the grapes are full and full of strings, which symbolizes remarkable results and bumper harvest.