The boiled h2o (100oC) is brought to the right temperature for your yeast to work as 10 - 15oC. This temperature is determined by the type of yeast and the type of beer. Saigon (also officially often known as Ho Chi Minh Town or locally in Vietnamese as Sài Gòn) https://cesarklklv.smblogsites.com/28056471/the-ultimate-guide-to-saigonlist