Food safety risk management and control system - provided by Food 580. Green food is China’s general term for pollution-free, safe, high-quality and nutritious food. my country's Green Food Development Center sets green food into two standards: Grade A and Grade AA. Class A allows limited use of restricted synthetic chemical substances, while class AA prohibits their use. Grade A and Grade AA are both green foods. Class AA green food logos and fonts are green with a white background; Class A green food logos and fonts are white with a green background.