April to June is the spawning season of herring every year. Fishermen catch a large number of herring, cook them in strong salt water with slow fire, and then put them into cans for natural fermentation. By mid-August, the herring in the can was vomited sticky and the air inside expanded.

canned herring (fei) is the most smelly food in the world, which is listed in summer in Sweden around August every year. By mid-August, the herring in the canned food became sticky and juicy, and the gas in the canned food expanded due to the fermentation of the herring, which made the canned food bulging. This means that the herring has been marinated as the first strange smell in the world, and it is said that the smell is 3 times that of natto. Compared with the canned herring, our stinky tofu is simply dwarfed. Just like our feelings for stinky tofu, canned herring is also a traditional food that Swedish people love.

canned herring is a kind of canned food with foul smell and sour taste. The biggest feature of fermented herring is its ubiquitous and persistent stench. Clean the herring, remove its head and viscera, soak it in salt water directly instead of cleaning, wait for fermentation until it has no smell of raw fish (what is the smell of raw fish, which I can't define), then take it out, and add new salt water to start the secondary fermentation. Stinky herring had to exist on people's dining tables, but now it has become a culture. In modern times with abundant materials, it can be preserved in icehouse, and even fresh herring meat can be eaten all year round.

Korean fillet of squid, which smells like a toilet, has a distinctive taste, and it will emit a strong pungent "ammonia gas" when it is finished. The Swedes set tables and chairs in the garden, and then served herring on the table, feasting and drinking and singing. People often eat herring with potatoes, onions, sour cream or bland cakes, chew them carefully or swallow them in large pieces.

In fact, canned loach fish has high nutritional value, but many people in China say it stinks and doesn't taste good.