Beijing Daxue xuebao. Yixue ban adopts following license: CC BY-NC-ND 4.0, which allows all users to freely copy and distribute all articles of the journal in any medium or format, as long as the license terms below are followed:

Users must give appropriate credit, provide a link to the license, and indicate if changes to the articles were made. Users may do so in any reasonable manner, but not in any way that suggests the journal endorses the use. Users may not use the articles for commercial purposes. If users remix, transform, or build upon the articles, they may not distribute the modified articles.

The full details of the license are available at https://creativecommons.org/licenses/by-nc-nd/4.0/deed.zh