High PR in Google Search Engine

In search engine optimization it is very common question that how a site can get high PR. This position (high PR ) required much hardworking in link building according to the rules of latest Google penguin and then linking the site to the high PR sites (PR 5 +) as much you make links on good PR site your site's reputation will also increase . So just linking your site with good PR or good reputations sites and gets high PR.