Why do construction sites need ambulances?

At the end of December, 219, the draft law on basic medical care and health promotion submitted to the 15th session of the 13th the National People's Congress Standing Committee (NPCSC) for the fourth review made it clear that public places should be equipped with necessary first-aid equipment and facilities according to regulations. First-aid equipment placed in public places is a beacon to illuminate the road to survival at a critical moment. However, in order to make this bright lamp really light up, you need to master the corresponding first aid skills. However, the penetration rate of emergency rescue skills in China is not high.