The country's grain reserves are mainly divided into four types.

National grain reserves are mainly divided into the following four types:

1. Central Reserve: The grain reserves that have been approved by the State Council to be distributed as a whole throughout the country are mainly used to deal with major natural disasters, major public events or other emergencies and to ensure national food security.

2. Local grain reserves: The local grain reserves established by the people's governments of provinces (autonomous regions and municipalities directly under the Central Government) in important grain varieties and key areas according to local demand and control ability are mainly used to cope with major natural disasters, major public events or other emergencies and ensure local food security.

3. Farmers' storage: Farmers and rural economic entities independently store food, which is mainly used to cope with major natural disasters, major public events or other emergencies and ensure their own food security.

4. Grain circulation enterprise reserves: Enterprises engaged in grain purchase, sale, storage and other activities independently store grain according to market fluctuations and supply demand, mainly for ensuring market supply and stabilizing market prices.

The types and proportions of these grain reserves will be adjusted according to the actual situation and needs of the country.