when you shopping, do you use white plastic bag?  

Well,I use plastic bags everyday,you know,if you buy something,you must use something to take it,and putting them in a plastic bag is the usual way that most supermarkets do nowadays.
I know that it may be a source of pollution,however,one can never take a paper bag or something like that with him,so using the plastic one is quite convenient and easy!

hmmm...i try not to take plastic bag if i'm buying small amount of items. according to your post, then China is making a good step now~