Preparation materials: longan: appropriate amount, water: appropriate amount and salt: appropriate amount.

1, when picking longan, leave a little handle. If the handle is removed, it will be difficult to save.

2. Pour a proper amount of water into the pot, then boil the water, and then pour the longan.

Keep heating for one minute, don't turn off the fire, so that the bacteria on the epidermis can be removed.

4. After one minute, take out the longan and drain it.

5. Leave the washed longan flat in the sun for a week.