The fresh leaves come from Ya'an mountains and are picked one week before Qingming Festival. It is mainly composed of one bud and one leaf, supplemented by one bud and two leaves. It adopts the process of baking, twice removing green, twice rolling, controlling shape for many times, and twice drying for aroma. The shape is curly and even, with a little white hair. The color of the soup is clear and bright. The high fragrance lasts for a long time. The bottom of the leaf is light green, and the front of the seedling is obvious