1. First, wash the fresh raw materials twice with clear water, find a big tank, put some salt, add half a tank of water, then put the washed blade raw materials in, put a stone on it, and finally cover the cylinder head with a lid. Generally, it takes about a week to marinate before eating.

If it doesn't taste sour, you can borrow a pot of old soup from your neighbor's house and pour it into the jar, so that you can eat authentic peasant yellow vegetables the next day.