I never got why they have this notion. I mean of course there would be some people like that but modt would be grateful to their adopted parents if they're treated as if they are their own child. And you have just as many ungrateful biological children. In the first place relationships don't have much to do with wether you're biologicaly related or not.

The concept of blood being thicker than water has been prevalent throughout history in essentially all parts of the world. Adopted children were seen much the same in the western world until fairly recently. (I'm talking recent as in within the last hundred years. See the stories of orphan trains sent throughout the American West even into the 1920's.) Some were adopted specifically because the parents wanted/needed more help on the farm or perhaps absolutely had to have an heir inorder to preserve the family heritage. In these cases the child was there to fill a role, not gain the love and caring of the parents. It doesn't surprise me at all that the ancient Chinese view on blood/non blood related children is much the same. To clarify I'm not supporting the concept. I myself have closer bonds with my chosen family than some blood relatives. But it's an unfortunate fact that this was and still is the prevailing view of society. Read more