For vertical search engines, web crawlers are extremely important because in the field of vertical search, data collection is all completed by crawler programs. Besides designing crawler programs, vertical search engines also need to manage the operation of these crawlers, which is a relatively complex task. Without an effective set of management tools, a vertical search engine could face a nightmare scenario. Another very important point is that among today's websites, there is an increasing amount of dynamic content. The ability to crawl this type of content will reflect the capabilities of a web crawler. Fortunately, we now have HaiZhu – the top-of-the-line web crawler system dedicated to vertical search. With HaiZhu, vertical searching becomes easier! By using HaiZhu, everything becomes systematic and simple.