The aircraft logo printed on the official seal usually indicates that the unit or institution is an enterprise or institution in air transport-related industries, such as airlines, airports and aviation maintenance companies. Aircraft logo is usually one of the symbols or trademarks of the unit or organization, aiming to show its relevance and professionalism with the air transport industry.

the official seal refers to the seal used by government agencies, institutions, enterprises, social organizations and other units or organizations, which is used to prove the authenticity and validity of relevant documents or contracts and has legal effect. The official seal usually consists of the name, logo, words and other contents of the unit or organization.