The purpose of the training is to equip and use essential drugs according to the regulations, implement the centralized online procurement and unified distribution system of essential drugs, implement the zero-difference rate to understand the national essential drug system and the selection of national essential drugs, and mainly master the common diseases, frequently-occurring diseases and critical diseases that need timely rescue on the spot in primary medical institutions. The symptoms of these diseases are all treated with basic drugs, and these drugs are skillfully used to treat these diseases. 1