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。

I have one girl and one boy myself.
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8 n, D' n& u. e* N1 H1 p1 I4 W5 n7 @Any one might know how to do this or help? How to do the paper work in China?
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  k: a9 p6 p3 r" Z: OThanks first.