Wine-making experience: Microorganisms are invisible and intangible, but their strange effects are amazing. Yeast converts the sugar in grapes into alcohol. Without yeast, grapes would not turn into wine. Miscellaneous bacteria play a big role in the fermentation process. If you don't pay attention to hygiene and come into contact with unclean containers and tools, you will end up with vinegar-flavored sour water. If the fermentation temperature is not controlled well, the wine produced will taste very bad and be difficult to swallow. Only when every aspect is done well can you get delicious wine.

You will reap melons if you sow melons, and you will reap beans if you sow beans. Failure is the mother of success. Only through experience can you understand that practice brings true knowledge, and efforts will always be rewarded.