In ancient days, this term had two meanings. One, it referred to correctness or orthodoxy, specifically in the interpretation of ancient classics. The term was often used as part of a book title, such as Correct Interpretation of the Five Classics. Two, it referred to principles of justice that were universally accepted and righteous. In modern times, the second meaning has prevailed. Today, it has become one of the core values of the Chinese society.
Acting on consideration of your legitimate benefit is called business. Acting on consideration of justice is called virtue. (Xunzi)