这里是论坛里有的微软官方下载地址
Windows 8.1 with Update (multiple editions) (x86) - DVD (Chinese-Simplified)
文件名: cn_windows_8.1_with_update_x86_dvd_4048000.iso
语言: Chinese - Simplified
SHA1:1AE3D04309885ED258981310CE90E3DA67B7D9B1
https://fp-pr1.ds.microsoft.com/TransferFile/FileTransfer.dll?spm=a1z09.2.0.0.Xief6P&Cmd=1&MN=412304176&Dir=1&Mode=0&Off=0&TS=C2B419AC-375B-430F-AE57-6C4A98D0FB8D&CVN=5,0,0,32
Windows 8.1 with Update (multiple editions) (x64) - DVD (Chinese-Simplified)
文件名: cn_windows_8.1_with_update_x64_dvd_4048046.iso
语言: Chinese - Simplified
SHA1:F44B2BBD1F6F243DAAE172FA8C1DB342CB98EDAA
https://fp-pr1.ds.microsoft.com/TransferFile/FileTransfer.dll?spm=a1z09.2.0.0.Xief6P&Cmd=1&MN=1270486024&Dir=1&Mode=0&Off=0&TS=2B53147A-42E7-4F17-8DC5-DC2F3D39DC57&CVN=5,0,0,32