Some raw materials that need to be prepared are: yellow wine, black dates, medlar, prepared rehmannia root and rock sugar.

The manufacturing method is as follows:

First, the black dates were washed and dried in cold boiled water, and then put into a dry container. Rehmannia glutinosa, Lycium barbarum and rock sugar were put in layers and soaked in wine for about 20 days before eating.

It should be noted that soaking black dates in yellow wine is more suitable for middle-aged and elderly people to nourish in winter, but not for children. Young people with cold hands and feet and insufficient blood can also eat some in winter.