Guangzhou Green Day Biotechnology Ltd is a comprehensive health service enterprise focusing on the research and development, production, processing and sales of traditional Chinese medicinal food, the development of secret recipes, and taste adjustment. Guided by the concept of preventing diseases in traditional Chinese medicine, the company pays attention to three meals a day and seasonal recuperation. It focuses on the output of products with both medicinal and edible properties and the promotion of traditional Chinese medicinal food culture. By adopting the method of preventing diseases, it reduces the probability of disease occurrence and helps everyone become their own health manager.

YUELOOP, a brand under Green Day Biotechnology, adheres to the innovative concepts of "Traditional Chinese medicine hidden in food, health preservation in taste" and "Healing in eat, Health in flavor". Relying on the profound heritage of traditional Chinese medicine and scientific research strength, it has launched health products such as those for anti-aging and immune enhancement, skin beautification and mood regulation, fatigue relief, and mood improvement. These products mainly include health-preserving teas, health candies, Chinese herbal drinks, and healthy water dispensers, etc.

At the same time, Green Day Biotechnology provides the service of traditional Chinese medicinal constitution identification. Through in-depth analysis of the constitution status and the characteristics of different constitution types, it can accurately grasp the overall elements and individual differences of individual health and diseases. On this basis, it recommends precise health food "tailored to individuals".