An agricultural technician irrigates hot pepper at a vegetable greenhouse in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
An agricultural technician observes hot pepper at a vegetable greenhouse in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
A worker feeds goats in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
A worker clears fodder grass at a breeding cooperative in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
A worker feeds goats in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
An agricultural technician observes hot pepper at a vegetable greenhouse in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)
An agricultural technician observes hot pepper at a vegetable greenhouse in Guide County of Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province, April 15, 2014. Guide strived to develop its modern agricultural economy along the Yellow River, and it has become a key food source in Qinghai. (Xinhua/Wu Gang)