Quintura can also be called a search engine. Don't be put off by its cluttered interface; its functions are quite powerful. It's divided into two columns. The left column should be considered as a catalog. Although it looks asymmetrical, unremarkable, and even uncomfortable to use, it actually contains a vast amount of information. When you move your mouse over the topic you want to select, it will automatically display the sub-topics it includes, layer after layer. The right column can be called a sub-catalog. It displays the content corresponding to the theme you selected in the left column, allowing you to make further selections. This is its innovative aspect in the realm of search engines. However, the amount of content displayed on one page is limited (clicking to the next page does not affect the left column), and since it's in English, meaning all the content inside is in English, it's rarely used domestically. I truly hope that a Chinese version will be born in the near future, so we can try something new.