Why can't I find the recruitment information of Railway Bureau and Changshui Airport on the Internet?

Because such units have no social recruitment channels, they only recruit fresh graduates every year. And it is to go to a college with relevant background. You can go to Southwest Jiaotong University, Beijing Jiaotong University, shijiazhuang tiedao university, Beijing University of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, civil aviation university of china and other institutions to see the official website recruitment column. It is the recruitment information of various railway bureaus and civil aviation.