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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; p/ t7 J) z" K- S+ U" JI have one girl and one boy myself.

Any one might know how to do this or help? How to do the paper work in China?
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8 B+ X4 I+ f: a8 J( AThanks first.