In Ningxia, Zhongning county's gojis have become ripe, and this red can not be separated from the Zhang Zuohan and his son. In the 1950s, when residents in Zhongning county have pulled out the gojis to plant grain, Zhang Zuohan insisted that goji, the most representative plants of Zhongning county should be grown. He promotes "Zhang's pruning method" in the …
