Make candied haws, a catty of sugar and half a catty of water, and so on according to this ratio. Boil the water, add white sugar and stir it. Don't stir it after saccharification, so as to avoid anti-sand. Put the glass brittle first, and then add citric acid until the sugar turns slightly yellow. How to judge whether the sugar is crisp or not? You can prepare a glass of cold water, stick some sugar with a bamboo stick, cool it in cold water and put it in your mouth.