The shelf life of rice varies according to its processing method, packaging method and so on. For example, vacuum-packed, the shelf life can reach 12 months or even longer; ordinary packaging, may be only a few months; bulk rice shelf life, relatively shorter. In addition, the storage season on the shelf life of rice will also have an impact, such as bulk rice summer shelf life of 3 months, fall and winter is generally 6 months. The shelf life of fresh rice flour can be used as a reference, estimated at two or three months,