Red Seal: Red Seal Round Tea, also known as modern Pu 'er tribute tea, was first made in 1940 when Fan founded Fohai Tea Factory. Both the inside of the cake and the tea are marked with red, and the front of the outer paper of the tea cake is printed with the logo of "Bazhong Tea" China Tea Company. In the circle of eight Chinese characters, there is a red word "tea".

Huang Yin: "Yunnan Qizi Cake" is actually a modern green-printed Pu 'er tea product, which was not produced by Menghai Tea Factory in 1950s. It is called "Huangyinyuan Tea" and is the ancestor of modern green-tea Pu 'er tea. Yellow-printed round tea turns golden yellow after aging, and tea cakes are yellow, so the word "tea" in the circle composed of eight red Chinese characters marked on the outer paper is yellow, while the word "tea" is marked inside.

Extended information: Hongyin Pu 'er round tea was first made by Fan when he founded Fohai Tea Factory. The logo of "Bazhong Tea" is printed on the front of the outer paper of the tea cake. The quality of tea products is also the best in modern Pu 'er tea, which is one of the foundations for Menghai Tea Factory to stand out in the history of modern Pu 'er tea.

Refer to Red Seal Pu 'er Round Tea _ Baidu Encyclopedia