orphan or abandoned Chinese baby girl

I would like to adopt an orphan or abandoned Chinese baby girl. I would like a baby of age as young as possible,
because, I would like to breast feed it by myself. Can you help me find the specific infos of how to proceed and
what is the minimum income etc. ? I am Swiss, have American Green card through extraordinary ability. I was living in China for 3 years and know Mandarin pretty well (MA in East Asian Research)