The difference between heaven and earth beam and heaven and earth box

What's the difference between heaven and earth beam and heaven and earth box? The beam of heaven and earth is horizontal, so the box of heaven and earth is covered, so there is a difference between them. Because the box of heaven and earth is bigger than the lid, it is also heavier. So the box of heaven and earth is a long metaphor, so it is usually a box of heaven and earth, and it is made of iron. However, the box of heaven and earth is usually installed in this box of heaven and earth, so it can only be installed after completing the task of this box of heaven and earth.