1. Search by official website: official website, Chinese Academy of Sciences provides rich academic resources, including various academic papers, research reports and patents. Users can enter keywords through the search box, and the system will return a list of related papers. In addition, the website also provides advanced search function.

2. China HowNet Search: China HowNet is the largest academic resource library in China, which contains a large number of academic papers and periodicals. Users can enter keywords through the search box, and the system will return a list of related papers. In addition, China HowNet also provides advanced retrieval functions,

3. Baidu Academic Search: Baidu Academic is an academic search engine launched by Baidu, which contains a large number of academic papers and periodicals. Users can enter keywords through the search box, and the system will return a list of related papers. In addition, Baidu Academic also provides advanced retrieval functions.

4.Google Academic Search: Google Academic is an academic search engine launched by Google, which contains a large number of academic papers and periodicals. Users can enter keywords through the search box, and the system will return a list of related papers. In addition, Google Academic also provides advanced search function.

5. Search by using databases such as SCI and EI: SCI and EI are internationally famous academic databases, which contain a large number of academic papers and periodicals. Users can search through the official websites of these databases.