Another characteristic of a good distance learning program is the equivalence of the distance learning course with the same subject materials as those students taking the course on the home campus.

Values contained in an equivalence class are considered to be equivalent in terms of their expected result. For example, look at a classic testing problem, such as the triangle program.

In this paper, according to some actual problems existing in Anhui power system, an improved REI equivalence has been proposed, and a program written in FORTRAN language is given.