One way to not do it is to go around to forums and say things like "I have a website NTES.com that I'm trying to get higher up the list on search engines like google". It looks to us like you are posting the link for the sole purpose of spamming a website, which hopefully is not your intention.
You can ask how to improve a page ranking without providing a link. The other thing to consider is that the search engines have algorithms that take link spamming into consideration. For instance, including a link to a commercial employment site on a free computer help site may actually hurt your ranking since the site in question is in no way related to the focus of this site.
So let's call that the first tip on how to raise the page ranking. Do not link to unrelated sites.