Google（谷歌）曾明確指出鏈接到某個頁面的外部北京網站建設越多，這個頁面的權重和排名就越高，這是Google的PR原則。如果想讓自己的網站有更好的排名，就需要有更多的優質導入鏈接（外部網站）來支持。
Google ( Google ) made it clear that link to a page to the external website more, this page weights and rank is higher, this is Google PR principle. If you want your web site has a better ranking, with respect to need more quality inbound links ( external site ) to support.

在增加更多優質導入鏈接前，應先了解什么是優質的導入鏈接？概言之，就是PR、Alexa=你的企業網站、且與你的企業網站行業相關度高的外部網站所導入的鏈接。提高優質鏈接的方法有以下幾個方面。
In a more high-quality import links before, should first understand what is quality inbound links? In a word, is the PR, Alexa= your corporate website, and your website industry related degree high external sites are import links. Improve the quality of the link method has following several aspects.

一、討巧的方法：
A method, choose the easy way out:

1. 參與知識問答平臺（如百度知道、搜搜問問、天涯問答等）的問題回復，在答案尾部或者參考資料來源處添加目標網站鏈接。最見效的方法是自問自答，但要注意使用不同的賬號來做問和答，同時要記得回答完畢后采納為最佳答案。建議始終用同一賬號來回答，這樣可以增加這一賬號的積分和等級，有利于實現高通過率。
1 in Q & a platform for knowledge ( such as Baidu know, Search Ask Search, end of the world as ) problem, the answer tail or reference sources added at the target site links. The most effective method is the question and answer, but pay attention to the use of different account to ask and answer questions, at the same time to remember the answer after the adoption of best answers. Recommend always with the same account number to answer, this can increase the number of points and ratings, conducive to the realization of high pass rate.

2. 參與社會化wiki平臺（如維基百科，百度百科，互動百科等）詞條的編輯，在詞條底部擴展閱讀部分添加目標網站鏈接。這招相比于上一招，難度有些大，需要你在編輯的原有詞條中修改或增加的內容足夠有價值，才能保證“添加目標網站鏈接”順理成章，一旦添加成功，將會對你網站的權重提高很多。
2 participation in social wiki platform ( such as Wikipedia, Baidu Encyclopedia, interactive encyclopedia entry editor, etc.) in the further reading section to add entries at the bottom of the target website links. This compared to a difficulty, some large, you need to edit the original entry, modify or increase the content of sufficient value, in order to ensure " add target links " logical, once added to the weight of your website, will improve a lot.

二、常規方法：友情鏈接交換
In two, the conventional method: links exchange

友情鏈接交換是獲得導入鏈接最常用的方法之一。對于友情鏈接的交換，需要注意以下幾個方面：
Links exchange is one of the most common methods of inbound links. For the exchange of links, need to pay attention to the following aspects:

1.選擇外部連接時，盡量考慮選擇匹配度高、價值高的網站進行互聯。如果是個做手機的網站，選擇與做手機資訊、或手機周邊產品（如手機屏、手機零配件等）的網站互鏈。如果違背此原則而選擇了一個做美食的網站，即使對方網站PR、Alexa值很高，對你網站的權重貢獻將微乎其微。要做好企業網站SEO的外鏈建設工作，不在量而在質。
1 choice of external connection, try to consider the choice of matching degree high, high value website internet. If it is a mobile phone website, choice and do mobile phone information, or mobile phone peripheral products ( such as mobile phone screen, mobile phone spare parts ) website link. If the violation of this principle and the choice of a food web site, even if the other site PR, Alexa value was very high, for the weight of your website will contribute very little. Want to do good business website SEO outside catenary construction work, not in quantity and in quality.

找到匹配度高、價值高的目標網站最快捷的方法就是：查詢競爭對手的網站。查詢競爭對手網站的常用搜索技巧如下：百度用“domain:域名”；Google用“link：域名”；yahoo則直接在sitemap.cn.yahoo.com輸入網址即可，yahoo查詢的反向鏈接比較精準，推薦使用。
Find matching degree is high, the high value of the target site the most efficient method is: query the competitor's website. Query competitor sites commonly used search techniques as follows: Baidu "domain: domain name " Google "; link: domain name "; Yahoo is directly on the sitemap.cn.yahoo.com input the URL, Yahoo query in the reverse link is more accurate, recommend the use of.

2.確定網站后，交換前需要仔細分析對方網站是否被搜索引擎懲罰過，如果有被懲罰過的痕跡，請慎重和對方網站交換鏈接。被懲罰過的網站單獨鏈向你的網站，是沒有任何問題的。但如果是你鏈接了被懲罰的網站，那就有可能被牽連了。
2 in determining the site, before the exchange requires careful analysis of the other whether the site is search engine punishment, if have punished the trace, please carefully and other websites Link exchange. Be punished site individually to link to your website, there is no problem. But if you link to be punished website, then it may be implicated.

3.做完這些事后，開始與對方交換友鏈。但要定期檢查你網站上鏈接到的友情網站，查看是否出現空鏈，查看對方是否會偷偷取消了導向你網站的鏈接。
Finish 3 after this, start with each other to exchange friends of chain. But to regularly check your website link to friendship website, see whether empty chain, view each other will secretly cancelled guide link to your website.
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