Excessive addition of preservatives, low cost performance. The "Mama" brand of Yangshengtang, the parent company of Nongfu Spring, has introduced a new instant rice which can be eaten by microwave heating. The main product is convenient for every meal. Emphasis is placed on using new rice in the season, and the formula is not added, only water and rice are added. The disadvantages of the product are too many preservatives, the taste is difficult to restore, the ingredients are not fresh enough, the cost performance is low, the weight is insufficient, and the operation is safe.