My son is learning hard pen calligraphy in grade one, but he uses a pencil. When can he exchange it for a pen? Can I use a pen directly?

In fact, pencils or pens do not conflict with writing exercises. The children in grade one are still young, and their manipulation ability is not strong, so it is more convenient to use pencils. Writing with a pen requires the orientation of the pen tip, and ink has obstacles, so it is more appropriate to use a pencil. However, it doesn't mean that you can't practice writing with a pen. It's just difficult for children, not easy to get started. Of course, it would be better to work harder.