What is the name of the square wood on the stage during calligraphy?

It's called paperweight or ruler or paperweight.

Paperweight is stationery placed on the desk, also called paperweight or paperweight.

Paperweights are things that are used to press paper when writing and drawing.

Now most of them are rectangular strips.

For some reason, it is also called a weight scale or a pressure scale.

The original paperweights had no fixed shape. There are gold, silver, copper, jade, wood, bamboo, stone, porcelain and other materials.

The origin of paperweight is that ancient literati often put small bronzes and jade articles on their desks to enjoy.

Because they all have a certain weight, people will press paper or books with their hands when they appreciate them.

Over time, it has developed into a learning tool-paperweight.