This chilled Chinese soup is based on honjozo soy sauce, and features the umami of dried bonito and beef bones, as well as the sharp sourness.
The soup is a straight type, so you can use it without diluting it, so it's very easy. Of course, you can enjoy it even if you adjust the taste by diluting it with water and adding ice to your liking.
It is also recommended to eat it over mugwort cold wheat.