28 categories and 2805 groups of fitness equipment. The specific products that can be registered are: 28022 1 dumbbell. Dumbbells for exercise. Ten product items can be selected for one registration, and additional item fees can be charged if necessary. Dumbbell-related products can be registered together, and the billing tax for dumbbells is classified into 28 categories and 2805 groups of fitness equipment. According to different tax objects, taxes can be divided into goods and services tax, income tax, resource tax and property behavior tax.