1, prepare onion and ginger, brown sugar. If you drink it alone, cook 20 grams of brown sugar, two onions, five slices of ginger and 200 grams of water for 10 minute, and then drink it while it is hot.

If it's too much trouble, you can put the brown sugar in a cup, cut the onion and ginger into fine powder, then boil a pot of hot water and rinse it with boiling water. Stew for 3 minutes and you can drink it.