File title: two lines are left blank under the red reverse line, and the font No.2 (bold) can be arranged in the middle of one or more lines. When returning lines, the meaning of words should be complete, the arrangement should be symmetrical and the spacing should be appropriate. Text: Imitate Song characters with No.3, usually black. Keywords: the word "keyword" is marked in bold type No.3, with a box at the top left followed by a full-width colon; Titles are classified according to the Thesaurus of Official Documents of the State Council, No.3 Song Ti, middle 1 word. Cc authority: if there is a cc authority, line 1 under the subject; There are 1 words on the left and right, marked "CC" with No.3 imitation song, followed by a full-width colon; Cc authorities are separated by commas, and aligned with cc authorities after colons when returning; Add a period after the last cc office. If the main sending organ moves under the subject words, the identification method is the same as that of the cc organ.