What kind of old primer is the best?

Traditional dough starter is the best. Steamed bread fermented by dough starter is fluffy and soft due to the process of adding alkali. Steamed bread made with dough starter is very delicious and healthy. Steamed bread made with dough starter is rich in B vitamins. If the body lacks B vitamins, there will be symptoms of limb weakness and lethargy. It is suggested that you eat more dough food made with dough starter, rather than food fermented with yeast.