To forecast the phase equilibrium of simple water-salt system, this article put forward a new method and give the program of it.

The comparison of deodorization of yeast fermentation, black tea salt system, complex purple Perilla salt system and smoking fluid salt system for silver carp fish was studied.

All of these reformations are not merely the change of salt system itself, they also changed the status and fate of merchants, which are closely related to the reform of salt system.