Farmers pick honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer picks honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer packs the newly picked honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer airs the newly picked honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer picks honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer airs the newly picked honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide) 

A farmer picks honeysuckle, a kind of herbal medicine, at a planting base in Liangjia Village of Binzhou City, east China's Shandong Province, May 20, 2013. (Xinhua/Dong Naide)