Special signs refer to names and abbreviations, emblems, mascots, etc. which are composed of characters and graphics and used in international or international cultural, educational, scientific research and other social welfare activities approved by the State Council. Validity period of special signs The validity period of special signs is four years, counting from the date of registration and approval. The owner of special signs may apply for extension within 3 months before the expiration of the validity period, and the extension period shall be decided by the administrative department for industry and commerce of the State Council according to the actual situation and needs. term of validity