1, EI retrieval query is usually through engineering query. Enter engineering keywords in Baidu, open the retrieval directory, and then click the marked link to enter the EI retrieval interface.

2. Enter the article by Wang Xiaoying of Qinghai University at the mark where the link opens, and then press Enter.

3. Observe the retrieval results. If no results are found, it means that they are not included in ei. If the results are found, it means that they are retrieved by ei journals.