Liubiju is rumored as having been founded in 1530 during the Ming Dynasty (specifically, in the ninth year of the Jiajing Emperor).
[1] One common story about the shop's origin is that it was founded by 3 brothers from Linfen city in Shanxi province of North China.
According to this story, the name Liubiju comes from the Chinese proverb “开门七件事：柴、米、油、盐、酱、醋、茶" (English: Seven items needed for going into business: firewood, rice, oil, salt, sauce, vinegar, and tea).
All kinds of sauces made with soybean are sold in bottles, jars and pouches.
[2] Article contains translated text from 北京六必居食品有限公司 on the Chinese Wikipedia retrieved on 10 March 2017.