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.
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1 t5 Y. v/ Q8 \3 m" v8 LAny one might know how to do this or help? How to do the paper work in China?

+ L+ c# s' C( z1 p9 z2 mThanks first.