What do you mean, bamboo and wood make a forest, and parents have shade?

If a family's children succeed through hard work and study, the family will enjoy a happy and prosperous life.

"Bamboo and wood make a forest" in this sentence means that children grow up to be useful talents or occupy important positions through hard work; And "parents have shadows" means that parents have gained glory and dignity and enjoyed a happy family life. This sentence also implies the importance of family education and child growth to a family.