This is because the national security department is a special department of the country, and its recruitment process usually goes through strict examination and screening to ensure that the quality and ability of recruiters meet the requirements. In addition, recruiting people through schools can attract more outstanding graduates and inject new blood and vitality into the department.
The school recruitment of the national security department is reliable, but you need to seriously consider whether your background and ability meet the requirements and carefully understand the recruitment process and career development of this department.