Printing-grade tea, printing-grade round tea, has different colors of "tea" printed on its wrapping paper (China Tea Company was approved to launch the registered trademark of "China Tea" brand on1951kloc-0/215, and eight Chinese characters surround one Chinese character, hereinafter referred to as "Bazhong Tea". There are red seals (paperless red seal, red-printed discus and first-class red seal), blue seals (paperless blue-printed discus, green seal of Chinese characters and green seal of artistic characters) and yellow seals (yellow-printed discus), which are called "yellow-printed round tea" and "the ancestor of modern Pu 'er tea", so they are packed in paper. Due to the scarcity of the world, it is often rare.