1, japonica rice soaking: according to the dosage requirements, put rice and water in the tank for seven days and seven nights, and change the water once in the middle until the water content of rice grains is uniform and saturated.

2, grinding: (water mill) It takes two or three people to grind on the stone mill, one person to grind, one or two people to push the mill. Add rice and water to the mill continuously to make the mill smooth and smooth.

3. Squeeze water: put the powder into a cloth bag, tie the bag mouth tightly, use pure natural plant ash to absorb the water in the bag, and use dry plant ash to replace the absorbed plant ash until the water in the bag is almost absorbed.

4. Brush powder: pour the pressed rice flour into a bamboo sieve and crush the block dry powder by hand. The mesh of the bamboo screen is about 0.5 cm square. The sieved powder is about small and uniform, so as to prepare for the quality of steamed powder.

5. Steaming powder: pour the sieved powder into a steaming bucket and steam it. The steaming barrel is a round barrel made of fir wood, and the bottom of the barrel is a steaming umbrella. The steaming umbrella is an umbrella-shaped chassis made of bamboo strips and loofah, which is beneficial to the steam in the scalding pot to rise, expand the contact surface and make the powder fully and evenly heated.

6. Watering rice (noodles): Watering rice noodles is a technical activity. It's too hard to pour, and it's easy to paste when it's not enough. Pour the steamed flour into a stone mortar, and one person picks up his head and tamps it. With the advanced and tacit cooperation of a person next to him, the hand soaked in water quickly included the powder stuck on the head of the stone mortar and quickly turned the powder in the stone mortar. Generally, a large stone mortar can hold 80 kilograms of gunpowder, a wooden handle mortar weighs 20 kilograms, a small mortar can hold 40 kilograms of gunpowder, and a wooden handle weighs 12 kilograms.