Is Barbie's corn steamed bread out of date?

Bobby corn steamed bread is made of old flour. There are a lot of yeasts and lactic acid bacteria in the dough, which can help the dough to ferment and make the steamed bread swell and soften during steaming. This fermentation method is very common in the production of traditional pasta in China, which can increase the taste and flavor of pasta. So Barbie corn steamed bread is also fermented with old noodles. Bobby corn steamed bread is a kind of steamed bread made of corn flour as the main raw material. It is a traditional snack in China, especially in the north.