1. Penghui is grass ash made of Pennisetum. After hundreds of years' use, it has been found in Lamian Noodles, Lanzhou, and it can increase the taste of Lamian Noodles after being added in Lamian Noodles.

2. the raw material of penghui is a kind of wild plant penghui, which grows on the dry mountains and dry ridges. the ash burned in late autumn is called penghui.

3. Just like alkaline water, a small amount of bitter fleabane ash is harmless to human body. If there is no potassium carbonate in the ash to help gluten form a tight network structure, it is impossible to pull out slender and stringy noodles.