Forward spheroidization is to put the solution mixed with seaweed gum into calcium powder water, which is the case with normal sweet caviar, and it will form semi-solid with time. Reverse spheroidization means that high-calcium or high-alcohol solution enters seaweed gel solution, which is generally used for spheroidizing cocktails or high-calcium liquids. The surface is fragile and the internal water content is high, so it needs to be eaten in a short time.