Baoning vinegar doesn't taste like vinegar. It hasn't expired yet. According to relevant public information, the shelf life of Baoning vinegar is 10 years or longer, and the longer the time, the more fragrant the taste. The reason why Baoning vinegar has no vinegar smell is that it is neutralized by adding water. Baoning vinegar is produced in Langzhong City, Sichuan Province. The history of Langzhong vinegar can be traced back to the Warring States Period. It was Bazi who brought the brewing technology of the Zhou Dynasty Palace to Langzhong. In the late Ming and early Qing Dynasties, Suo Yiting pioneered the technology of using wheat fermented vinegar.