Well... I did bring down my sister once long time back, all u need is proof of relation connectin ur brother 2 u, which can b seen frm the passport. The only problem is, u need 2 convince the 3-star police officer at de immigration counter or in his office abt the reason of 6months stay of ur bro in de country. And den, der is certain forms tht wud v available 2 u at the immigration which has 2 b filled along wit a fee.