Tools: Lenovo ThinkVision, Microsoft Windows 7 Ultimate, 360 Secure Browser 13.5438+0.
1. If you want to get the classification number of China Library, you can use online query. Here we click on the browser to query.
2. After opening the secure browser, enter the search page of the browser. We directly enter "Chinese Library Classification Number" in the search box, click "Search" and select the first piece of information.
3. Next, we will enter the "China Library Classification Number" search page. We can also use the search method to query and input keywords according to the research direction of the paper, such as "laser technology". The related results will appear below, click to enter.
4. After clicking in, I found that there are many technical classifications under this classification, that is, I subdivide the items and continue to choose the appropriate classification.
5. Repeat the previous step until the classification is not continued. If all the subdivisions are included, select the previous classification number, so that you can get the specific classification number of the paper and input it into the paper.