I can't. I know by querying Kyushu Drunk Catering Network. The reason why the wild strawberries pickled with sugar bubble is that the moisture content in wild strawberries is too high, and the effect of sugar leads to bubbles in fermentation. Fruit fermentation leads to deterioration or the existence of polluting microorganisms, generating acidic substances, which will cause uncomfortable symptoms and diseases such as gastritis or enteritis, which is harmful to the body.