SouthTofuAlso known as gypsum tofu, it uses a liquid of gypsum to set and has a softer, finer texture.Northern TofuAlso calledbrine tofu,as its name suggests, the setting agent is brine. Compared withsouthern tofu,it is firmer in texture and less smooth on the cut surface.With the ness of food markets now comes many new types of tofu to choose from.There are tricks to selecting good tofu; high-quality tofu has a neat cut, no impurities, and is elastic;while poor quality tofu has an uneven cut with possible embedded impurities, it breaks easily and feels sticky on the surface.Northern Tofu or called northern tofu,also known as old tofu or hard tofu.