收养16 years old boy，just 失去亲父, how to申请?

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收养16 years old boy，just 失去亲父, how to申请?收养16 years old boy，just 失去亲父, how to申请到加拿大? 母亲失去监护权，以后不可能申请到加拿大探亲的机会。
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5 F% D! ~5 s2 f: P$ X  dI have one girl and one boy myself.
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Any one might know how to do this or help? How to do the paper work in China?

% S$ x4 L8 ]1 QThanks first.