translation

Etiquette to a society is just like clothes to a person. A person with proper clothes on, or a person naked in public, is not only laughable, but also unethical; likewise, a society without adequate etiquette could fall into chaos, since regular social interactions could be easily interrupted by pointless conflicts and disputes. If a society were a train, etiquette would be the rail, for the train could only move forward along the rail; if a society were a VIP coach, etiquette would be the wheels or axles, for the coach could not roll without them. Without etiquette, best friends could become deadliest enemies, friendly or allied countries could resort to war. Numerous such examples can be found in human history. Therefore, I would advice you to treat others  with proper social etiquette, and to try your best not to break its code of conduct in order to avoid offending others or making enemies unnecessarily.