First of all, a successful topic selection should reveal the goal orientation of the research, that is, what kind of goal the research should achieve. The goal orientation of research reflects whether the research is valuable or not.

Secondly, it refers to the specific research scope. The theme of success should be specific scope, not big and comprehensive. In other words, the topic should not be too big. Too big a topic will make the research impossible to go deep. On the other hand, if the theme style is very small, scientific research will be overly addicted to fragmentary key points, thus losing its use value and taste.