When writing a utility model patent application, I omitted to attach a picture. Would it be faster to issue a new drawing or delete that part of the description?

It is recommended to delete the number in the text part of the description that does not involve drawings. If so, add a drawing. The filing date will be recalculated from the date you add the drawing. It is only related to the application date. Regardless of cancellation or supplementary drawings, a statement of opinions or supplements must be sent to the National Bureau. The review and approval time is the same.