How to describe the placement of desks and chairs in calligraphy classroom

It can be described by metaphor.

Description is description, writing is imitation, and description is a concrete and vivid description of the state of people or scenery through certain writing means (such as vivid language and simple and straightforward dialogue).

This is a common expression in general narration and literary writing. The function of description is to reproduce natural scenery and things, describe the appearance and inner world of characters, and make the environment of characters' activities concrete.