What is the appropriate age for children to practice writing brush calligraphy?

It is more suitable for children to practice brush calligraphy at the age of five or six. Because children are young, they understand the writing method of using pens and basic strokes too early. It's better to learn brush strokes bigger, but it's expensive to practice brush strokes. In addition, to practice calligraphy, we must first choose a good copybook. It is suggested to choose a European copybook and practice strictly from the basic strokes and structure. In practice, we should pay attention not only to quantity, but also to quality. Every word we practice depends on how different it is from the copybook. If there are differences, children should try to practice the same as copybooks.