Go to the drugstore to buy vitamin E capsules, then prick them and apply them to your beard. Keep going like this every day, and the beard will grow.
Or put your feet on the beard and stick to it for more than a month, and the beard will grow out.
You can eat more black sesame seeds, walnuts, red dates, longan and so on. In your usual diet, you can also eat more fresh fruits, such as apples, which will promote the growth of your beard.