The first method: retrieve the projects approved by the National Natural Science Foundation of China every year, log on to the inquiry website of the Fund Committee, enter "project subject words", and then inquire by year. Generally, you can know the hot issues in your research direction and the main research units in China by inquiring about the projects in the past three years; \x0d\ The second method: Check the website of the 863 Department of Science and Technology, which will publish some information such as major projects and application guidelines from time to time. Although all this information was dug by Daniel, for us bugs, we can see hot issues in this field; \x0d\ The third method: check the website 973 of the Ministry of Science and Technology, which will publish the annual project and the short version of the task book of the newly approved project from August to September every year. Everyone can download it then. After the publicity period, it will not be downloaded, and there will be more detailed project introduction. These research contents should be said to be some major research directions and hot issues; \x0d\ The fourth method: Pay attention to the top international academic conferences in your field and get the collection of papers as soon as possible. From the content, you can see the international research status and hot spots in your research field, such as SigCom, Infocom, ICC and other conferences in the field of network communication! \x0d\ Fifth method: Pay attention to the top journals at home and abroad in your field. These journals hold special issues every year, and the topics of these special issues are some hot issues being studied at present. \x0d\ In addition, the papers published in general journals were published at least one year ago, so most of these papers can't represent the hot issues in current research! Can only be used as a reference! \x0d\ I hope the bugs have other good ways to supplement it here!