自问自答，找到了
找到hosts这个文件，用记事本打开
120.92.249.145 www.3dmgame.com
120.92.249.145 dl.3dmgame.com
122.226.122.23 bbs.3dmgame.com
122.226.122.21 att.3dmgame.com
112.64.235.19 s.3dmgame.com
122.226.122.6 so.3dmgame.com
122.226.122.21 file1.3dmgame.com
122.226.122.21 pic1.3dmgame.com
120.92.249.145 kaifu.3dmgame.com
182.118.64.110 cache.adm.cnzz.net
122.226.122.21 att.3dmgame.net