Alkaline water can be made by pouring cold water with straw ash. The specific operation method is as follows:

1. First, light the straw and let it burn fully.

2. Next, after burning the straw, collect the straw ash in a basin.

3. Then add a proper amount of boiling water to the basin full of ashes.

4. Then stir well.

5. Next, find a piece of gauze to filter the gray water.

6. Finally, pour the filtered grey water into the steamed rice, as shown in the figure.