I think it's by mail. I remember I went back to my hometown when I graduated. The file was sent directly by the school to the local education bureau. I have a dispatch card in my hand. I took the dispatch card to the Education Bureau to open a letter of introduction, and took the file to the unit to report. Organizational relationship is a letter of introduction from the school party organization directly to the local party organization, and the files are all together. It should be about the same by now.