Family harmony is the most important thing, safety is the foundation of the factory, strengthen discipline and ensure safety. What does this mean?

Does the subject want to ask, "harmony is the most important thing at home, and safety is the foundation in the factory. What is the significance of strengthening discipline and ensuring safety?" Obey the rules and discipline, safety first. Harmony is the most important thing at home, and safety is the foundation in the factory. Discipline is strengthened and safety is guaranteed. This sentence usually appears on the construction site as a safety slogan, warning workers to pay attention to safety and remember not to be careless. Other on-site safety slogans include "No matter how busy production is, safety is not forgotten, life is supreme, safety is the first" and "safety comes from long-term vigilance and accidents come from instant paralysis".