1. Observe the age of tea trees: Old tea trees usually have thick trunks, rough bark and many dead leaves on the trunks. Generally speaking, the trunk diameter of old tea trees over 50 years should reach 10 cm, which is much thicker than that of young tea trees.
2. Observe the shape of tea leaves: the tea leaves of old tea trees are larger than those of young tea trees, and they are strip-shaped, about 3-5cm long and1.5-2.5cm wide. The tea skin is generous, the texture is tough, and the tea is thick.
3. Smell the tea fragrance: The tea fragrance of the old tea tree in Longjing is more mellow than that of the young tea tree, and the aroma is more intense, such as orchid fragrance and Maotai fragrance.
4. Taste tea soup: The tea soup of Longjing old tea tree has smooth entrance, rich flavor, more diversified taste and fresh, deep and lasting flavor characteristics.