Shanghai dragon often headache, not included, can not talk about ranking index. In particular, to achieve a certain scale website, the website is a full collection of troubling Shanghai Dragon technology, for example, when the page reached hundreds of thousands, no matter how, how to optimize the site architecture design, 100% included is impossible, can only try to improve the collection rate. But sometimes how to prevent search engines may also become a problem recently, has increasingly become a problem. To prevent the recorded information as confidential information, copy the contents, advertising links etc.. The commonly used methods include stop included password protection, put content in the table behind, the use of JS/Ajax, Flash etc.. Today saw an article in the blog network noble baby, these methods are not insurance.