Lo Hon Ko (or better known as Luo Han Guo in Mandarin)

Tips on choosing a good Lo Hon Ko:
Get one of the fruit and check whether it can bounce. A good Lo Hon Ko will bounce like a ball.

Wash it. Crack open it. Halved the fruit. Boil for 1 to 1 and 1/2 hour.

Lo Hon Ko is known to cure sore throat, cough and cold.

If you want the drink to be sweeter, add in a Matt Chou (Honey date). Otherwise, Lo Hon Ko itself is sweet enough.