The six-figure model of Yintai Liubao Tea is very easy to distinguish. As you said, 6909 1 6,69 is Yintai or its trademark is Cangshun, 09 is 2009,1is the first-class tea, and 6 is the sixth batch of tea in that year. Read it together. Yintai Liubao Tea was 1 grade tea in 2009, the sixth batch in that year.