Lycium barbarum can be found everywhere, at the street corner of the park, in front of the Agriculture and Animal Husbandry Hall, next to the old building. Anyway, there are many places. You should mainly look at the quality. You can't buy Lycium barbarum in a particularly red color. Dark red is the best. Of course, the bigger it is, the better it is. If you give it away, it is good to buy Zhongning Lycium barbarum (famous). If you eat it yourself, I suggest you buy it from the Academy of Agricultural Sciences.
Eight-treasure tea can be found in all the places where Lycium barbarum is sold, and there is not much difference between good and bad. It is all ok!
Good things in Ningxia are:
Licorice, a kind of Chinese herbal medicine, is good, but it is used in less places.
Two fur, it's nice to be a scarf. It's very warm!
Purple mushrooms in Helan Mountain are delicious. If they are sent to foreigners, I'm afraid they can't cook well (note that mushrooms and wine must not be eaten together, which will be poisoned).
Lycium barbarum bud tea and Lycium barbarum leaf tea are health-care teas.