Making old noodles: 5 kg of water, 7.5 kg of new flour, 35 g of sweet baking powder and 30 g of yeast powder. Water and flour ingredients are mixed with warm water and placed for more than 5 hours, and placed in cold water for more than 8 hours, which becomes old noodles.

Dough making: The ratio of water, old flour and new flour is different in different weather, such as 5: 1: 8 in general weather, 5: 1: 9 in hot weather and 5: 1: 7.5 in cold weather.