Pistacia chinensis can be directly dried in the sun, which usually takes 7 ~ 10 days. Before drying, the leaves need to be washed with water. When air-drying, put the leaves in a ventilated, dry and semi-cool environment, and air-dry after 10 ~ 20 days. When steaming, steam for 20 minutes every day, then expose to the sun and repeat for 5 ~ 8 days to dry.

Sun drying method of Pistacia chinensis Bunge

Pick Pistacia chinensis leaves in July and August and rinse them with clear water. At this time, the flowering period of Pistacia chinensis has passed and the fruit damage is immature. It is very suitable for picking the leaves of Pistacia chinensis, which can ensure the freshness of the leaves and the loss of nutrients.

The drying of coptis chinensis leaves can be carried out on the ground. Spread a thin plastic film on the ground, and put the cleaned Pistacia chinensis leaves on it to ensure exposure in sufficient sunlight. Generally, it can be dried in 7 ~ 10 days. Too long drying time will lead to excessive loss of nutrients in leaves.

After the leaves of Pistacia chinensis are dried, they can be dried. Put the cleaned leaves in a ventilated, dry and semi-cool environment for air drying, and they can be completely dried in 10 ~ 20 days. Although air-drying will take a lot of time, this method can minimize the loss of nutrients in the leaves themselves.

Pistacia chinensis can also be steamed dry. Steam the leaves with hot steam for 20 minutes every day, and then expose them to the sun. Repeat this for 5-8 days, and the leaves of Pistacia chinensis can be completely dried. High-temperature evaporation can eliminate germs and pests, which is beneficial to the storage and preservation of leaves in the later stage.