What does correspondence mean? Who are the enrollment targets?

Correspondence is not only a national examination system, but also a new educational form. The enrollment targets are all kinds of high school students with nationally recognized academic qualifications, on-the-job workers and other social personnel except ordinary high school graduates. Extended information correspondence is not only a national examination system, but also a new form of education. The enrollment targets are all kinds of high school students with nationally recognized academic qualifications, employees and other social personnel except ordinary high school graduates.