My brother bought a Diablo 3 copy from China, and i stay in Malaysia. We were thinking whether we can share the same account and play in different country?
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.
In short, I would not suggest doing this. You will probably get banned. It will almost certainly end in tears.
Yes, you could share it. You can decide to play with the same 8 characters or, changing the server, playing with different characters. You can choose to play in US ,Euro or ASIA server and for every one you can have 8 characters. To change server on main login screen click "Options" then go to "Account" and click "Server Region Selection"
You can't play together but with the same account yes ^^