20 to 30 minutes. Be a fan and recommend warm water. Put your hand in the water, it's a little hot. The temperature is about 40-50 degrees Celsius. Usually it takes about 20 minutes to soak in warm water and more than 30 minutes in cold water.
Vermicelli is a traditional food made from sweet potato and potato by pulping and precipitation. All parts of China have their own unique production technology. The finished vermicelli is grayish white, yellow or yellowish brown, which can be divided into round vermicelli, fine vermicelli and wide vermicelli according to its shape. Cooked vermicelli tastes smooth and elastic, and can be made into delicious food with pork and chicken.