Is there any bean juice in Ziguangyuan?

Yes Ziguangyuan opens early every day, and there are many kinds of meals. The first menu in the shop is bean juice, but the taste is hard for outsiders to accept. Bean juice is a traditional snack unique to old Beijing. According to written records, it has a history of 300 years. Bean juice is made of mung beans, and the residue after filtering starch is fermented into vermicelli and other foods. It has the effects of nourishing stomach, detoxicating and clearing fire.