When one enters Mainland China via Zhuhai, there is a huge underground market right there as one exits from passport/visa formalities. There is an endless array of curio shops, but not all items on display are genuine. I found the paper-cuttings and wall-hangings particularly splendid. One has to bargain because it is a very touristy area. Be sure to shop around and compare prices. And if you are hungry, there are plenty of food stalls selling snacks and full meals. Prices are reasonable.