The soybean milk that tastes bad in Beijing is called bean juice. According to the relevant information, drinking soybean milk is a breakfast drink that many of us will choose. Authentic Beijing soybean juice tastes very strange, and foreigners can't drink it, and locals can't get tired of it. The reason why soybean juice is sour and smelly is inseparable from its production process. The reason why soybean juice is sour and smelly is that it naturally has a strange smell after fermentation and cooking, which is a bit like the rancid smell of sewers. Many people can't accept it. It is different from the barrier-free soybean milk we accept. Soybean milk is processed by soybeans, while soybean juice is brewed by soaking mung beans, grinding and fermenting, and then cooking.