CNKI (China National Knowledge Infrastructure) is the largest academic knowledge infrastructure in China and the largest academic resource library in China, providing a large number of academic papers, periodicals, patents and other resources. The following are the steps to search using HowNet:

1. Visit HowNet official website: First, you need to visit HowNet official website (www.cnki.net). On the home page, you can see a search box, which is the main entrance to search.

2. Select the retrieval type: HowNet provides a variety of retrieval types, including subject retrieval, article title retrieval, author retrieval, unit retrieval and so on. According to your needs, choose the appropriate retrieval type.

3. Enter a search term: enter the keyword to be searched in the search box. For example, if you want to find a paper on artificial intelligence,

4. Set search criteria: Below the search box, you can set some search criteria, such as time range, literature type and subject classification. These conditions can help you find the information you need more accurately.

5. Search: Click the "Search" button next to the search box, and the system will find relevant academic resources for you according to your keywords and search conditions.

6. Browse and download: On the search results page, you can view the abstract, author, publication time and other information of each paper. If you are interested in a paper, you can click on the title to enter the full-text reading page. Some resources may need to pay or log in through the school library account to read the full text.

7. Use the advanced retrieval function: If you need more complex retrieval, you can use the advanced retrieval function of HowNet. On the Advanced Search page, you can customize search criteria, such as combining multiple keywords and setting Boolean operators.