Papers are usually closely related to fund projects, which are often some key scientific research projects. With the support of project funds, the thesis is a form of project scientific research achievements, including topics. Therefore, papers related to fund projects will indicate the fund number in the article. If there is no relevant fund project in the paper, there is no need to indicate it. This is not a hard and fast rule.

It is relatively easy to publish some domestic academic papers funded by fund projects, so it is suggested to number the papers funded by fund projects, even if it is published a little. Marking the fund number is also helpful for future topics, because so much fund support has finally produced output, which is the embodiment of the results.