How to deepen or refine cad drawings! Is it difficult? Is it necessary to draw detailed drawings every day?

It seems that you don't understand the deepening or refinement of cad drawings. Some employers write this for professionals, usually furniture drawings, or design units do some design work. For example, if a designer designs a table shape, then your ability should be to refine the shape and draw various detailed drawings with CAD. The factory should be able to process it according to your drawings. During this period, you should also understand the processing technology of furniture, which is very demanding.