As the tutelage standard, etiquette includes two aspects: On the one hand is the concrete standard and the system, on the other hand is the abstract principle.

• 作为修养标准的礼仪包括两方面：一方面是具体规范和制度，即“礼节”或“仪规”，另一方面是抽象的原则即“中”或“中道”。