201112. The Ministry of Health issued the General Rules for Nutrition Labeling in prepackaged foods, which is one of the "National Standards for Food Safety". It is mandatory to indicate the trans fatty acid content in the food nutrition table with hydrogenated oil as the ingredient, and the trans fatty acid content in each100g product is less than or equal to 0.3g..

So as long as the trans fatty acid content is lower than 0.3%, the content can be written as 0, less than 3 grams per kilogram.