求救：申请130，帮兄弟移民，已递交3年多。突然要我和兄的出生证 好酒2014-12-08 05:09:41

当初申请时，已递交中国公正的本人出生证和兄的公正的出生证。目前移民局来信：
No date of birth registration--petitioner,
No date of birth registration--bebeficiary
they said it doesn't clearly indicate the date of registration.
这是中国的出生公证：
This is to certify that XXX, male, was born on Dec,5th,1978 in Beijing, the father of XXXX is AAAAA, the mother of XXXXX is BBBB.

移民局还要旁证，请问还有什么能证明兄弟关系的？ 有经验的大侠帮忙，多谢了！

帮忙啊，大侠们！在等