Put a few cloves of garlic in the middle or both ends of the rice bag, or wrap some peppers in cloth or paper and put them in a rice container. Usually, the rice storage tank or barrel should be cleaned to prevent cordyceps pupae from hiding in it. Once you find Mi Chong, you can dry the rice in the shade and let the bugs fly away or climb out. The rice with insects can be eaten after it is removed. Don't expose rice to the sun. There are other methods: Method 1: Dry the moisture in the skin of fresh garlic, break it into petals, put it directly in a rice jar, and bury some in a deep and shallow place. This method can also be used to prevent mung beans from being infected. Method 2: Prepare a few clean small gauze, each gauze is wrapped with a little pepper seed, and then put it in rice. If the rice is packed in a rice bag, you can soak the rice bag in the boiled pepper juice first. It also has the function of preventing insects. Method 3: Put dried kelp or dried orange peel in the rice to prevent moisture and mildew. If there are bugs in the rice, put fresh ginger in the rice to drive away the bugs. In addition, you should take it out to bask in the sun on sunny days.