I see it quite regularly, so it must be acceptable. I once seen a woman with the hugest silver dollars I have ever seen, blew my mind. Worthy of the guiness book.

I havent seen much... the main reason being that very few Chinese mothers breast feed!..

and also so much internet activities going on.. if u take out the breast and feed in public.. i am sure pics will be floating around over internet..

Still have seen once in a posh restaurant... oo.. very nice bbs...

I saw mothers feeding their children couple of times. They were sitting in parks or on the sidewalks. It does not bother me if you do it discreetly. You can't just put your breasts out like that... have some decency... At one point, the child is hungry, but what is also important is the fact that people look at you.

Will only say two things :

breastfeeding in public is common in China.  Whenever and wherever the kid is hungry, the breast pops out and he or she gets the feeding.  i see it many times.

Chinese people do not look.  But foreigners do !.

I had a young Chinese couple staying with me, thy are 27 years of age, recently married, one baby boy.  The mother will feed the baby making no difference if I was present or not.  after a few days, it stopped bothering me.  Guess I got used to it.

i don't mind looking at a breast or two in public

Why shouldn't it be acceptable? It's natural. When the baby is nursing, you can't see much and mother can half cover the baby and breast with her blouse.

It's something I've yet to see in China.  Most new mothers I know are all about the formula (always asking if I can bring some back from the US).