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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I have one girl and one boy myself.

9 o2 X! Y- y- K5 {+ l' ~5 ]8 _Any one might know how to do this or help? How to do the paper work in China?
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  P8 x( P6 L% X3 r, NThanks first.