1. If there is brewed vinegar, do not choose prepared vinegar.

2. If there is solid fermented vinegar, do not choose liquid fermented vinegar

3. If there is traditional craft vinegar, do not choose new craft quick-brewed vinegar.

4. There are natural (colored) vinegars, do not choose white vinegar.

5. There are vinegars with high acidity, do not choose vinegar with low acidity

6. There are vinegars without preservatives, do not choose vinegars that contain preservatives.

7. There are vinegars with a small amount of precipitation. Do not choose vinegar with no precipitation.

9-degree rice vinegar is not suitable for soaking eggs, because 9-degree rice vinegar is produced using a liquid quick-brewing process. The main component of vinegar is acetic acid (acetic acid), and vinegar is harmful to the human body. Most of the health-care functional ingredients are ingredients other than acetic acid, and only vinegar produced using traditional solid-state fermentation technology contains these ingredients that are beneficial to human health.

Using 6-degree traditional solid-state craft vinegar to soak eggs is better and more scientific than using 9-degree rice vinegar.