我还有个mm，看了移民局网站是这样说的：
Provide documents that you meet the balance-of-family test, including:
proof your relationship with each of your children
proof your child or children live permanently in Australia
A notarization showing how many children you have and who they are.
A Permanent Residential Visa of your child or children. He/She/They should have this Permanent Visa Grant letter.
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