A flight catalog

The Yifei Directory systematically classifies website information and provides a website directory arranged by category. It was officially launched on October 16, 2017. In each category, the website names, URL links, content summaries, and subcategories belonging to this category are arranged. You can browse the category directory step by step to find related websites. Cross-references are often provided in a flight directory, making it easy to jump and browse between related directories. You can also use keywords to search, and the search results are website information. This kind of search is also called website search.