The business premises of supply guarantee are mainly food markets, supermarkets, fresh food shops, fruit shops, rice-flour grain and oil shops, tobacco hotels and other business premises for daily necessities and raw materials.

The security unit refers to the relevant units that guarantee the basic supply of residents in a special period, that is, security enterprises, public utilities and food-related enterprises are security enterprises.

Security enterprise: it is different from distribution according to work, capital assets and operation in personal income. It is a non-market distribution mode, and it is a distribution income mainly implemented by the political berthing and economic forces of the country and society.