According to the Announcement of the General Administration of Quality Supervision, Inspection and Quarantine (Announcement No.34 No.20 20 10/0 of the General Administration of Quality Supervision, Inspection and Quarantine), the enterprise food production license mark is expressed by the abbreviation "QS" in the pinyin of "enterprise food production license" and marked with the word "production license" in Chinese. Compared with the original English abbreviation QS(quality safety), the meaning expressed is different. The main color of the logo is blue, the letters "Q" and "Production License" are blue, and the letter "S" is white. An enterprise that has obtained a food production license shall not change its color when using the food market access mark, and mark the number of the food production license certificate. The serial number consists of English letters QS plus 12 Arabic numerals. The first four digits of the serial number are the number of the accepting institution, the middle four digits are the product category number, and the last four digits are the serial number of the certified enterprise. Logo introduction: The green food logo is a quality certification logo officially registered by the Green Food Development Center in the Trademark Office of the State Administration for Industry and Commerce. Green food refers to the safe, high-quality and nutritious food that is planted, bred and applied with organic fertilizer without high toxicity and high pesticide residue under the standard environment, production technology and hygiene standards, and is recognized by authoritative organizations and uses special marks. According to the requirements of China Green Food Trademark Logo Design and Use Specification Manual, green food enterprises printed green food logo graphics, characters, product numbers and the words "green food logo approved by China Green Food Development Center" on product packaging. Scope of application: Today, when healthy living is advocated, green food has become the first choice for people to consume. The varieties of green food mainly include grain, oil, meat, dairy products, eggs, drinks, wine, coffee, tea and so on. Warm reminder: driven by interests, some businesses have expanded the scope of use of green labels, expired and abused them. When consumers buy green food, they should clearly understand whether the green food mark and registration time have expired to prevent being fooled.