How to reduce the oxidation of beer?

Oxidation is a big problem for beer.

If the beer is over-oxidized, the hop aroma will become lighter, the color will deepen, it will be bitter, and it will have a cardboard taste when drinking. Therefore, we need to take certain measures to control the oxidation in the beer production process (except that oxygen in the main fermentation period is conducive to yeast reproduction, Any oxidation in other processes is harmful to the beer).