At present, Yangda Library mainly uses China Library Classification (referred to as Chinese Library Classification) as the basis for book classification.

Detailed Rules for the Use of China Library Classification:

1. Since June 1999, all the books in our library have been classified according to China Library Classification (referred to as Chinese Library Classification), and the listed class names and class numbers shall not be increased or decreased at will.

2 "China Library Classification" category notes, especially the comprehensive notes of superior categories, should be handled with reference; Under normal circumstances, the library will not adopt options or details such as "if necessary", "if necessary" and "if possible".

Classified attention

The category number is limited to eight digits (excluding Latin letters and dots). When assembling numbers, the letters and symbols in the assembled class number are counted as numbers); Those that have been surpassed by copying and using special classification tables shall be omitted from the ninth place. The use of general subdivision table is not limited by grade.

Dissertations should be roughly classified, and the length of class number should be limited to three digits (excluding Latin letters), followed by semicolon -533.