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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8 w. m5 \1 M7 D/ hI have one girl and one boy myself.
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# X! ^8 p; c0 \. ~5 x: q& Z- L1 @: AAny one might know how to do this or help? How to do the paper work in China?

+ A9 O+ k: m/ Q  RThanks first.