Can I share my Diablo 3 account? [closed]

China and Malaysia are both part of the Asian region for purposes of Diablo III. While Global Play does allow you to play in any region, so, for example, if you wanted to play on American servers while your brother played on Asian servers in order to keep characters segregated, you could technically do that, there's a bigger problem here.

Specifically, that Blizzards terms of use for Diablo III and Battle.net accounts in general explicitly prohibit this sort of behavior. Furthermore, because you're both based in Asia, and using IP addresses in different countries, this is going to expose your account to a very high level of scrutiny, meaning it's very probable that you'd be caught, have your account banned, and your license to the game revoked.

In short, I would not suggest doing this. You will probably get banned. It will almost certainly end in tears.