Administrative emergency: Refers to the system in which state administrative organs exercise emergency powers to control and handle public emergencies. Based on the above definition, which of the following is options that are not administrative emergency? ['Administrative agencies take emergency measures after earthquake disaster.', 'Letter-and-visit authorities take measures against individual visitors who disrupt their office order.', 'Martial law issued after severe unrest.', 'Epidemic infectious diseases that endanger human life and health, administrative agencies take emergency measures.']