The materials that need to be prepared in advance are: 200g of rice flour, moderate amount of warm water and moderate amount of vinegar.

1, the first step is to prepare dry rice noodles.

2. Then, put the dried rice noodles in a big basin and pour in a proper amount of warm water.

3. Then pour a proper amount of vinegar into the basin and stir well.

4. Stir well and let stand for half an hour.

5. Take out the rice noodle after half an hour and let the hair soak.