The main reason is that there was not such a good production technology to grind flour at that time. More importantly, because of the richness of material life, brown bread has undergone many improvements, so it has become a popular phenomenon in contemporary society. Of course, at that time, eating brown bread was a very good choice. At that time, many countries even ate bark and grass roots to fight. So the black bread in the Soviet era was actually very happy.

This is mainly because the present material life and material conditions are very rich. More importantly, the grinding technology of flour has become very excellent, making flour very delicate. More importantly, other edible substances are gradually added to the present brown bread, which makes it very delicious and elastic. Moreover, his quantity is very large, which also conforms to the modern people's dietary concept, because his ingredients are very healthy.

Of course, the most important thing about this kind of bread is that Westerners like it very much. However, due to the economic development in recent years, orientals have gradually come into contact with many foreign foods. However, because of its delicious taste, this kind of brown bread has been welcomed by the people of China. Of course, China's black bread has been improved many times, which is very suitable for China people's taste, so it is actually different from Soviet black bread at that time.

Of course, this is mainly because the living environment now is much better than then, because it is a good choice to have a bite of brown bread in that war-torn environment, so we should cherish the hard-won peaceful life now and build our country through study and work.