I’ve learned that paying full price is not common practice in China. Depending on what you are purchasing or where you are purchasing it, price bargaining is often accepted. If it is a larger store or a recognized brand it is not likely that you will be able to negotiate. However the smaller shops will be more than willing to entertain your offer. My advice is to determine what you are willing to pay and have that amount ready to purchase.
In Xitang I purchased a beautiful hand painted glass teapot. I did not intend on negotiating as I normally would. I was very impressed with the time and effort he put into painting each one that I did not mind paying the price that was listed on the price tag. Yet the gentleman who ran the shop offered me 10 元 off and I am not quite sure why he did. Maybe it brought him joy to see someone admire his work or maybe he was just being kind, either way I am very happy with my purchase.
It is likely that you will see many things in China that you want to buy and bring home or give as gifts. Often you will see the same item at many different shops (unless it’s a unique piece). I found its best to ask for a business card or exchange WeChat information and find the best price. Keep in mind that you will acquire many things along your journey; the challenge will be getting them all back!