Premier Wen Jiabao called for calm and efficient organization of disaster relief work on the afternoon of May 12,shortly after the earthquake measuring 7.8 on the Richter scale jolted Wenchuan County of southwest China's Sichuan Province.Speaking as he flew to the disaster-hit area to oversee relief work,Wen said the Communist Party of China Central Committee and the State Council had ordered officials at all levels to the frontline to organize disaster relief.