Hongji Fine Seed breeding Center, a subsidiary company of  Zhangjiakou Hongji Agricultural Science and Technology Development Co. Ltd , is engaged in breeding and culturing seed potato and mini tubers. It includes tissue culturing center for virus-free seedling which occupies an area of 33.3ha with capacity of 50m stems; a 25,600m2 of seed potato warehouse; 200ha of green house with an yield of 100m grain of mini tubers; 1,333ha of planting base with an output of 40,000t seed potato. These high quality seed potato not only can meet requirement for itself and surrounding areas, but sold to Shanxi, Inner Mongolia, Shan’xi, Ningxia and Gansu province.