2. When making bean powder, you can first wash and drain the soybeans, heat them, put them in a wok, turn to low heat, stir-fry them with a spatula, shovel them out and pour them into a wall-breaking machine to make bean powder, then beat them again after filtering, and repeat them for about 3 times.

3. Rolling on a donkey is one of the traditional snacks in Northeast China, Old Beijing and Tianjinwei. The finished products are yellow, white and red, which are really beautiful. Because the soybeans spilled in the final production process are like the bursts of loess raised by wild donkeys in the suburbs of old Beijing, it is named "snowballing".