The black wolfberry in Gansu is the best. Gansu is located at the southern edge of Tengger Desert and Badain Jaran Desert, with an altitude of 1500-3000m. Because it is located in a desert area, the temperature difference between day and night is large. Coupled with abundant sunshine, the temperature in summer is moderate (15-26 degrees), which is higher than that in Qinghai. Gansu is suitable for grape growth, and Wuwei, Gansu is known as the wine city of China, which is most suitable for the growth of Lycium barbarum.