Since 2021, China has been reducing the permitted packaging for certain products to limit excess packaging, particularly in the food and cosmetics sectors. The initial regulation set a limit of four packaging layers for most products, but this has been reduced to three for tea and tea-related products. Manufacturers are also restricted from using precious metals or premium woods for packaging, and the cost of packaging should not exceed a certain percentage of the retail price. Additionally, the mass of the packaging should not be more than eight times the mass of the product. These changes, which include different k-values for different tea products, will be enforced starting March 1, 2025.