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。

+ L9 v1 X5 s4 i8 j$ X' |6 UI have one girl and one boy myself.
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  P& l$ i$ C# V; O+ [& |* `Any one might know how to do this or help? How to do the paper work in China?

Thanks first.