1. Contact the periodical publishing house directly: Many foreign sci-tech periodicals have their own official website, and you can find the subscription information directly on the website. Usually, they offer various subscription options, including paper version, electronic version or both. You can choose the appropriate subscription method according to your own needs.
2. Subscribe through the library: Many universities and research institutions have their own libraries, and these libraries usually subscribe to a large number of scientific journals. If you are a student or a researcher, you can ask whether your library subscribes to the periodicals you want. If so, you can read these periodicals through the resources of the library.
3. Use online databases: There are many online databases that provide subscription services for various scientific journals, such as JSTOR, SpringerLink and ScienceDirect. These databases usually provide full-text download and online reading services, which is very convenient. However, these databases usually require a paid subscription.
4. Use open access resources: Some scientific journals will provide open access services, which means that you can read their papers for free through the Internet. Although the number of open access journals is relatively small, it is a good way to obtain free scientific journals.
5. Join academic groups: Many academic groups, such as research groups and societies, regularly organize activities and subscribe to certain scientific journals. By joining these communities, you can get these periodicals at a lower price or for free.