The quality inspection of hops and hop products can be divided into two parts: appearance inspection and physical and chemical index analysis.

It should be considered that different concentrations of fermented wort require different amounts of yeast added. If the concentration of fermentation is high, the amount of yeast added should be more. A high concentration of wort means that there are a large number of components that need to be metabolized and transformed by yeast, and the proportional relationship between the substances and the medium needs to be balanced.

When beer is poured into a glass, the liquor will produce white and delicate foam, which is shaped like a beautiful white flower, so it is often called "the flower of beer". Generally, the foam of beer will last for 2 to 4 minutes, and some beer foam will last for as long as 5 to 6 minutes.

The pursuit of perfection is human nature, and the perfect and unique high-quality craft beer is of course the dream of every craft brewer. However, affected by various factors such as environment, equipment, raw materials, process technology, consumption, etc., sometimes the beer produced often fails to reach the ideal goal, and there are always defects of one kind or another.