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If you are building itself the chain, you probably have make a decision to spend much time or energy to do what anchor text is to reflect your target keywords of the chain, and which is to let him look more natural some not for the purpose of ranking. Though you probably already know more or less consciousness to two kinds of external chain all give attention to two or morethings, but a lot of SEOer or choose difficult to choose the first kind of external chain, admittedly, will be a lot of manpower material resources to establish cannot directly produce the outer chain is a very dull thing, but now you have to ensure that more than 50% of the outer chain anchor text is in your target keyword outside of the.