How to make Meng Po Tang?

The practice of Meng Po Tang is as follows:

1, add 3500g of water to the pot.

2. After boiling, add tartary buckwheat 250g, dried hawthorn 15g, dried tangerine peel 10g, crystal sugar 150g, cinnamon 6g, lemon slices 5g, preserved plum 150g, licorice 5g and salt 10g in turn.

3. After boiling again, turn to low heat and cook for 30 minutes, then filter and let cool.