Why does the number of backlinks differ so much?

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Backlinks are links to other sites that indicate the extent to which their sites are popular, and thus are an important indicator of quality. It is not exaggerated to say that the number of backlinks and quality, determines the site in the search engine evaluation of the weight, so, improve the site or page of the number of backlinks, has become a lot of webmaster assiduous goal.

Today, two different webmaster tools to query their own website (http://gy.yes81.net/), found a strange phenomenon, let me doubt, is the different tool query, reverse link number is too large. As shown in Figure I:

This is the http://www.webmasterhome.cn/(Chinese webmaster's home) query, I am more agree with this query results, because by writing soft, blog to get the reverse link can be detected in time, this tool found 64 backlinks. This is the use of http://tool.chinaz.com/(webmaster tools) query, two query time between less than two minutes, so excluded from the update.

As shown in figure three for ease of comparison, I will search engine included in the case also screenshot down, you can see that the two tools of the query results in the general agreement, but in the reverse link, the difference is too big, webmaster tools only 4! A strip of inspection, found that I in the outdated, A5 and so on to get the reverse link is not included, The backlinks of these sites should say that the value of gold is very high, we also know that different webmaster tools due to evaluation indicators, data collection differences, resulting in different query results. However, as webmaster tools, query results should have a certain comparability and reference, can not be "international standards", "national standards" and "local standards."

If the same site, find out the result of one in the days of a place, we should believe which one?

Confined to my level is limited, here only to do the site to find the process of the problem, to make a point! Welcome to the Expert advice or recommend! QQ653463830