Currently, foreign games that enter the Chinese market need to be censored and "published" by a Chinese internet operator such as Tencent, Shanda or NetEase. NetEase is the operator for World of Warcraft in China.
The crack in question, released by the notorious game hacking group Skidrow is basically a server emulator for Diablo III. The server emulator would allow the game to think that it was "connected" to Blizzards server, thus allowing the player to play Diablo III offline. Currently the crack is still in its beta stage but a working torrent has been released.
Perhaps due to the overwhelming popularity of Blizzard games in China, as of this writing, Tencent and People's Daily have highlighted story on their websites. The writers for the stories went even as far as to say, "we hope that SK group can have this crack working 100 percent, so that we can play Diablo III before there is an official operator."
The articles also ask potential users of the crack to bear with the problems as the crack is only in beta. "We, as the guinea pigs, will have to be prepared for bugs but at least we can play offline."
Now there are countless legal issues at play with what the Tencent and People's Daily articles are promoting. Interestingly enough both articles which read oddly familiar only bring up the legal issue of who will operate Diablo III when it is officially allowed into China, completely foregoing the obvious break in end user agreements and piracy laws.
《暗黑3》Skidrow局域网破解版放出 [People's Daily]
国外破解小组再逆天 暗黑3免费破解版放出 [Tencent]