Mushroom and vegetable buns. How to make white and soft big buns

In this video, I will share with you a mushroom vegetable bun, and at the same time share the tips for making white and soft buns, as well as the detailed methods of wrapping buns. If you want to make the buns vegan, you can replace the oyster sauce with light soy sauce and the dried shrimps with soaked and chopped glass noodles. We put a little baking soda in the filling to help the vegetables keep green after steaming, but please don't put too much, otherwise it will affect the flavor of the filling, you can also not add the baking soda.

Recipe (for 12 big buns)
Wrapper part:
All-purpose flour 400g
Water about 205g
Sugar 5g
Yeast 4g
Oil 10g(any oil that is not too strong in taste and not too dark in color)

Shiatake mushroom and bok choy filling:
bok choy/Shanghai Green/ 550g
about 10 dried shiitake mushrooms 30g about 10 (130g fresh shiitake mushrooms)
baking soda, about 1/8 measuring spoon
Oyster sauce 15g
Dried shrimp 10g
Sesame oil 20g
Chopped green onion 20g
Salt about 1-2g according to personal taste

Please refer to the video for the packaging method and steaming time