What is the necessity of confidential patent application?

A confidential patent is an invention patent that involves national security and interests and needs to be kept confidential. Where national security needs to be kept secret, it mainly refers to the national defense special technology, which is accepted and examined by the National Defense Patent Section authorized by the Patent Office; Where the national interests need to be kept confidential, the Patent Office shall accept the confidential patent. The publicity of these inventions will affect the national defense ability, damage the political and economic interests of the country or weaken the economic and technological strength of the country. An invention-creation applying for a secret patent does not include utility models and designs.