Add yeast, edible alkali and clear water to flour, make hard dough, put it on the chopping board, knead and press it, gradually sprinkle flour, and press it repeatedly until the surface is smooth. Then, the dough mixer is pressed into a round cake blank with a diameter of about 24 cm and a thickness of about 2 cm block by block with wooden poles, and baked in a shovel, turning it frequently until it is light yellow and uniform, and the dough is slightly bulging.