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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4 ]4 F& x% Y; f; B3 N8 RAny one might know how to do this or help? How to do the paper work in China?
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! B' c2 Y: s, iThanks first.