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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. E. U' H& j- b& LI have one girl and one boy myself.

- u+ w# L# V( T0 B! x+ i% ~- T) EAny one might know how to do this or help? How to do the paper work in China?

) P: h6 S* a" E  TThanks first.