Because there are many microorganisms and bacteria in the food overnight, and nitrite will be produced in the sauce after being left for a long time, eating by mistake will lead to diarrhea, stomach pain and other symptoms, which is not good for the health.
Zhajiang noodles is a traditional noodle in China, which is known as one of the top ten noodles in China. Zhajiang Noodles is a popular area, very popular in the north of China, and Zhajiang Noodles with different production methods is also found in Shaanxi, Tianjin, Shanghai, Guangdong and Northeast China.