1. The yuba should not be soaked in water for more than 72 hours. If the yuba is soaked for more than 72 hours, it will deteriorate and it will not be completely edible. If yuba is soaked in water for too long, it will breed a lot of bacteria and contaminate the food.

2. The yuba should be soaked in warm water for more than 4 hours. If it is cold water, it will take one night or about 10 hours, and the water needs to be changed many times during this period.