Dayi brand's "7572" is a standard recipe from the Menghai Tea Factory, often called the model for Pu-erh shu (ripe) tea. The 2006 production is known as a valuable vintage tea that has undergone a certain amount of aging. Features of "Dayi 2006 7572": * Classic Shu Tea: In the world of Pu-erh shu tea, it is a benchmark for evaluating quality and taste. * Meaning of the Recipe Number: * The first two digits, "75," indicate the year this recipe was developed (1975). * The third digit, "7," indicates the approximate average grade of tea leaves used (the smaller the number, the higher the grade of young leaves). * The last digit, "2," is the factory code for the Menghai Tea Factory. * Blending: It is made by blending spring-picked golden young leaves for the surface and summer/autumn-harvested green and mature leaves for the inside. This increases its value. Its quality is recognized worldwide, including winning a gold medal at the 2002 Pu-erh Tea International Competition.