February 21, 2007. The Green Production Certification Trademark was officially registered with the National Trademark Office on February 21, 2007. It is used to identify and prove that production materials are safe, effective and environmentally friendly, and is suitable for green food production. Compared with ordinary agricultural production materials, the most significant feature of green production is that while taking into account high efficiency, the requirements for food safety and environmental protection are much higher than those of registered general pesticides and fertilizers.