Cough is not good, rock sugar and salt boiled water every time you drink a large bowl, drink a few times you can see the effect!
The specific operation is as follows:
☞ Take four or five rock sugars and put them in a pot with water and bring to a boil
☞ Then add some salt and cook together
☞ After cooking for a short while, you can turn off the heat
(Don't be too strict, this rock sugar boiled brine tastes just the right sweetness and saltiness)