The tea exports of Chinese black tea have long since existed. That is, in the process of processing black tea, due to the screening process, naturally occurring bud tip and end teas are screened and classified into buds (Sifiting, such as wolfberry buds, nymphs, etc.), Broken tea, and vice tea. There are flowers, tea and tea stems. In 1958, the Central Ministry of Commerce and the Ministry of Foreign Trade jointly sponsored the Hunan Procurement Department and the Hunan Academy of Agricultural Sciences to successfully trial the production of red broken tea in the Anhua, Hunan Province, using traditional methods to create a precedent for the development of red broken tea production in China. In 1964, according to the needs of international trade, the Ministry of Foreign Trade, the Ministry of Agriculture, the Ministry of Agriculture, and the Ministry of Agriculture decided to issue documents to six tea plants (plants) in Yunnan Bohai, Yingde, Guangdong, Xinsheng, Sichuan, Hubei plano, Hunan Lijiang and Jiangsu Furong. As a result, large-scale trial production began, and at the same time, special machinery for red broken tea, manufacturing technology, and quality specifications were also gradually formed, laying a solid foundation for the development of red broken tea production in China. In 1967, the Ministry of Foreign Trade formulated and issued four sets of uniform standards for the processing of red broken tea in accordance with the requirements of the international market for the quality specifications of red broken tea and the specific circumstances of the vast tea regions in China. The first set of samples is suitable for use in Yunnan Province, the use of Yunnan large leaf species of red broken tea, including 17 colors, set 17 standards. The second set of samples is applicable to large-leaf red broken tea other than Yunnan large-leaf species in Guangdong, Guangxi, and Sichuan, with a total of 11 designs and 11 standard samples. The third set of samples is suitable for red broken tea made by medium and small leaf segments in Guizhou, Sichuan, Hubei, and Hunan, with a total of 19 colors and 19 standard samples. The fourth set of samples is suitable for red broken tea produced in Zhejiang, Jiangsu, Hunan and other small leaf species, a total of 16 flowers, 16 standards. In 1980, the China National Animal and Animal Husbandry Import & Export Corporation made changes to the quality of the domestic rotor and the CTC method, and on the basis of maintaining the original quality, simplified the reform of the four sets of samples. The number of samples changed from 17 samples to 8 standards, the second sample changed from 11 to 7 standard samples, the third sample changed from 19 to 7 standard samples, and the fourth sample changed from 16 to 6 samples. Standards.