There is no fixed standard for the number of national competition papers. Generally speaking, the number of papers in national competitions depends on the complexity of the topic and the depth of research. Some papers may be only a few pages, while others may be dozens of pages or more.

But if you mean the submission requirements of national academic conferences or journals, there are indeed some restrictions. Generally speaking, these conferences or periodicals will stipulate the page range of papers. The common requirement is 10- 15 pages, which means the length of the paper should be within this range. If your paper is only 15 pages, it is not too small to meet the requirements of conferences or periodicals.

It should be noted that the length of the paper is not the only index to measure the quality of the paper. What is important is that the paper can clearly express the viewpoint, the structure and logic are reasonable, and the problem is deeply studied. So don't stick to the sheer number of pages.