Preparation materials: 4 bottles of beer, 2 slices of ginger, 5 crystal sugar, 4 red dates, proper amount of Lycium barbarum and 2 spoonfuls of fermented grains.

1. First, put the crystal sugar, ginger, red dates, medlar and fermented grains into the pot together.

2. After adding the ingredients, open the beer and pour it all into the pot.

3. Then start to boil the beer for about three minutes.

4. Finally, put the beer in the pot into a cup and you can drink it.