Heewen Soju is a brand of Daxian Distillery in South Korea, with a history dating back to 1930. Xiwen Soju, also known as C1 Soju and Xiwan Soju, is a particularly popular soju brand in the Busan and Gyeongnam regions of South Korea. The sake is popular for its mildness and cleanliness, and today C1 Soju has taken a significant position in the Korean market.
 
It has an alcohol content of 14% vol and is a grapefruit-flavored blend. Its ingredients include distilled spirits, grapefruit juice concentrate, lemon juice concentrate, edible spices, etc. In 2015, it won the Grand Prize in the Diluted Shochu category at the Korea Alcoholic Beverage Grand Prix and the Bronze Award at the International Wine & Spirit Competition (IWSC). The price of a single bottle of this soju online is 14.5 yuan.