Dregs vinegar is also called women vinegar and March 8th vinegar. It is boiled with a little pepper, garlic, oil, etc. Extracted from the remaining distiller's grains after brewing. It was the most famous one before Wenchang Store, and now there are several in Haikou. There is also a food stall at the intersection of Wenming Dongbanqiao. Adding kelp silk, seaweed, buckwheat head, beef offal, pig offal or seafood to the dregs vinegar is very popular. The main function of waste vinegar: it is good for human blood circulation. Long-term consumption can beautify, reduce fat and lower blood pressure.