There are four explanations about the process of document retrieval, which also involves the order of document selection. Let's take China HowNet as an example to demonstrate the process of document retrieval. Use China HowNet's "Advanced Search" first. Second, determine two key words. Third, among the collected documents, we should screen them according to the clarity and concreteness of the research objects, and give priority to eliminating "so-and-so" documents, even without reading them. Fourth, choose the topic according to the preserved literature. In the above process, there are many aspects involved, such as which documents we can eliminate first, and then filter them repeatedly according to the degree of clarity and specificity, and there are many other issues that we can't all involve, mainly the content pointed out. First of all, from the perspective of different types of papers, such as journal papers, dissertations and conference papers, we should first keep journal papers. Conversely, the first thing we need to retrieve is periodical papers. If the number of periodical papers is not enough, we should pay attention to other types of papers. For example, we only retrieve one or two journal articles. At this time, you can consider dissertations and conference papers, some contents in professional databases, and even some policy documents, including some printed materials, for reference. But the first step we have to do is to read the journal papers first. Then, journal papers also have priority. Look at the core journal papers first, and then pay attention to the general journal papers if the number of core journal papers is not enough. In the thesis, you should read the doctoral thesis first. If the number of periodical papers and doctoral papers is not enough, we should pay attention to master's papers, which is an order of choosing different types of documents.

After opening China HowNet, many people habitually enter their own things in the search box on the homepage, and then start searching. They don't even order "advanced search", and you don't pay attention to topics, keywords, titles or full text, which is very inefficient. What is an efficient document search process? On the new website of China HowNet, there is an advanced search on the right of the search button. We click advanced search.