Primary explain nofollow tag
Carter excavator repair time determined by the <a href="http://www.tianqi.com/nanjing/15/" rel="nofollow"> Nanjing Weather </a>
Add the nofollow: http: //www.haivo.cn/1022 for http://www.tianqi.com/nanjing/15/ cast a useful vote, lose a little score
Do not add nofollow: weight is not lost, the score is not lost
Common places:
Page, the page is not involved in unrelated keyword ranking, should add nofollow tag