Does the invention content part of the patent specification have to be described step by step?

Formatted to make your description clearer. The general summary part is to copy the claims, and then describe the advantages and effects of the technical scheme expressed in each claim one by one. If you can describe it clearly with confidence, you don't have to pursue format. Now that you have applied for a patent for invention, what you said step by step will be clearly written in the concrete implementation sooner or later. For example, if necessary, describe the action process and production process in detail, otherwise it will bring questions to the examiner, and it will be difficult for you to supplement it by replying to the review opinions.