Douzhi is at room temperature when it leaves the factory, so it is called raw bean juice. It can be drank directly to cool down and relieve heat. Generally, the bean juice you buy in douzhi stores is heated and ready-cooked bean juice. When heating raw soybean juice, it is generally advisable to use low heat. Avoid boiling the pot over high heat. Generally, heat the soybean juice until it begins to bubble. At this time, the juice is full and it is best to drink. According to tradition, bean juice is usually served with shredded mustard greens, mixed with peppers and sesame seeds, served with charring rings, grilled, and eaten hot. It is a traditional halal snack, often seen at breakfast.

There are several points to note about bean juice:

1. Raw bean juice should not be stored for too long and is best eaten fresh;

2. Bean juice has detoxification function and cannot be mixed with medicine;

3. The production process of bean juice is rigorous and complicated, so it is recommended to buy it from regular production and processing stores.

Douzhier is a unique food in old Beijing. According to written records, it has a history of 300 years. It is a wonderful traditional snack. Douzhier is made from mung beans. After the starch is filtered out to make vermicelli and other foods, the remaining residue is fermented. It has the effects of nourishing the stomach, detoxifying, and clearing fire. At the same time, because the starch content is almost zero, it has a positive effect on controlling blood sugar. , so it is favored by diabetic patients.