We mentioned this special Oolong cold brewing method in our Hello Li Jiang blog. Here is the detailed brewing method:
Add 10-15g Oolong tea into a 1L teapot, and then add small amount of lukewarm boiled water to warm up the tea leaves. Throw away the warm water, and then quickly pour cold water into the teapot to full. Store the teapot in refrigerator for 4 hours then serve. One beauty of this brewing method is that you can still brew the tea leaves with hot water after brewing them for 3 times using cold water!
Tea Lovers at JinYuXuan Tea House