1. Sushi can be stored in a food box or covered with plastic wrap and then stored in a cool place. Never put it in direct sunlight, so sushi will go bad easily. Sushi can also be kept at low temperature for about one to three days. But if sushi is preserved for too long, its taste will change, so it is best to eat fresh sushi. It is best to keep it at four to six degrees when it is refrigerated, so that the fresh-keeping effect will be better.

2. If the rice balls need to be preserved for a long time, they can be wrapped with plastic wrap and then frozen in the refrigerator, so that the rice balls can be preserved for a long time without freezing. If the rice balls are just cooked and need to be taken out within the same day, there is no need for special preservation methods. This way, even if the rice balls are frozen, they will not freeze hard. If you want to take out the frozen rice balls to eat, you just need to thaw them naturally indoors.