GB/T 9833.3-2013

This standard specifies the requirements, test methods, inspection rules, and labeling for Fu zhuan tea, a post-fermented compressed tea brick produced primarily in Hunan, Shaanxi, and other regions of China. It is applied in the production, quality control, and trade of Fu zhuan tea to ensure consistent product characteristics such as appearance, aroma, taste, and the presence of the beneficial "golden flower" fungus (Eurotium cristatum). The standard is used by tea manufacturers, regulatory bodies, and commercial entities for testing and certifying this specific type of dark tea in domestic and international markets.