I believe many people have experienced, Baidu obviously had included an article, at certain times has been deleted? This is another in what is the reason? Foshan website building through research and found what may be in for several reasons: one, the site belongs to the new site; 2, the site is in the study period; 3, the repeatability of site content is too severe; 4, web content related to the topic of too low; 5 , low quality article content sites, of course, a website if the new site, then there Baidu study period is also essential, even if high-quality website content, there may be the case. However, no tension, just after the study period, slowly running, the website article basically be put out. So how to prevent the collection of articles Baidu has been deleted it? 1, to ensure the article content uniqueness; 2, to ensure the article relevance; 3, ensure that the article will not be a lot of high weight websites reproduced, as is the high weight of websites reproduced, there will be that they included faster than you, so is likely to become their original, you is reproduced, it will likely not included; 4, to ensure regular updates of articles; 5, quality website content of the article.