Farmers are busy harvesting the Chinese wolfberry fruits in Zhongning County of Ningxia Hui Autonomous Region in northwest China, July 2, 2009. More than 12,000 hectares of Chinese wolfberry are in the harvest season in Zhongning County. Ningxia is a leading production base of Chinese wolfberry, which has long been used in traditional Chinese medicine or as a tonic element. (Xinhua Photo)

Farmers are busy harvesting the Chinese wolfberry fruits in Zhongning County of Ningxia Hui Autonomous Region in northwest China, July 2, 2009. More than 12,000 hectares of Chinese wolfberry are in the harvest season in Zhongning County. Ningxia is a leading production base of Chinese wolfberry, which has long been used in traditional Chinese medicine or as a tonic element. (Xinhua Photo)

Farmers are busy harvesting the Chinese wolfberry fruits in Zhongning County of Ningxia Hui Autonomous Region in northwest China, July 2, 2009. More than 12,000 hectares of Chinese wolfberry are in the harvest season in Zhongning County. Ningxia is a leading production base of Chinese wolfberry, which has long been used in traditional Chinese medicine or as a tonic element. (Xinhua Photo)