回复：想作馒头,但是都3个多小时了,面还没有发起来,怎么办啊

Yeast, oil, sugar + wheat flour mix well and wait for
10 to 24 hours, depends on the temperature then
+ baking soda ( depends on the mount of flour ) and mix well again and then wait for another 30 min.
then make bun and wait for another 10 min. and then steam. You will have very nice buns ( man tou )