What are the characteristics of Kenya's 72-hour treatment? what is K72?

For professional baristas, please pay attention to the coffee workshop (Wechat official account cafe_style) Kenya 72-hour treatment method: referred to as K72, select the maturity of coffee fruit sweetness 21 when harvested after the same day, select the best fruit for peeling and fermentation, fermentation time for a total of 24 hours, use clean river water in the tank, wash after 24 hours, and ferment again with clean river water for 24 hours.