I am very good at making 馒头包子, "我买了DYR YEST(小袋装的), 就用这个和面 行么?整袋都放进去还是放一点点就够了"---it depends on how many flower you use. I never use recipe to make 馒头包子, it just need more time for flower to raise if you use a part of a bag dry yest rather than a whole bag, so it really doesnot matter. The most important is never use the baking soda or baking powder for that purpose.