The first link and the second link are both Laoshui Link (Shuimu Tsinghua bbs), which is actually a website. This is the oldest Shui Mu. Later, due to official pressure, ID was only available to users on campus (in fact, you can still apply outside the school). The official did, but everyone ignored it.

The third is Shui Xin (Shui Mu Community) website, which was created by students spontaneously, all from the original old water moderators, mainly from Tsinghua.

Much richer than old water. And the popularity of the old water is generally 45 thousand (last year)

If you put it in the postgraduate entrance examination, I suggest you go to the department edition of each department or go to AimGraduate.

This is a special edition related to the postgraduate entrance examination.

For example, you go to the Department of Chemical Engineering.

If you are browsing the web, search and enter chemical industry on the left, and then go in and ask.

If you are fterm, click on the classified discussion area, and then the bottom is the postgraduate entrance examination and textual research.

I still suggest you bind the version.