Zilin aged vinegar is the vinegar produced by Shanxi Zilin Foods Co., Ltd, whose predecessor is Shanxi Qingxu Jinyuan Aged Vinegar Co, The main products include: "Zilin" "Kou Zhun" brand old vinegar, aged vinegar, high-quality vinegar, health care vinegar, fruit vinegar tea, seasoning powder, soy sauce and so on, which are sold well in the whole country, and have been in the trend of oversupply. Its vinegar products combine the five flavors of "sour, soft, sweet, fragrant and fresh" into one, which is unique among the traditional old vinegar products in Shanxi.

In November 1997, it successfully registered the trademark of "Longyanjing". Yuji Huairen Rongxin Brewery was renamed as Jinzhong Huairen Rongxin Brewery in 2006. Located in the largest vinegar brewing base in Shanxi, known as the first village of vinegar brewing in Shanxi, Yuji Huairen, Jinzhong City, the history of vinegar brewing in Huairen has a long history, starting from the Jiaqing period of the Qing Dynasty, with more than 300 years of history, which is famous both at home and abroad. It is famous in the world for its five characteristics of color, fragrance, mellow, thick and sour.