1. Pickling the sour beans takes at least 7 days or more. 4-5 days in winter and 3 days in summer, mainly depending on the color change from green to slightly yellow.

2. The pickling time will affect the acidity and brittleness of snap beans. The longer the pickling time, the greater the acidity and the stronger the sour taste. However, with the extension of time, the crispness of snap beans will weaken. In hot weather, the beans will turn yellow completely in 3 days, and they will be sour and brittle after one week. However, it should be noted that the nitrite content of pickled food is the highest in 3~8 days, so it is necessary to avoid eating during this period. It is best to eat it after 1 days. If the weather is too cold, it will take almost half a month to eat.