The trademark "Hongyan" is registered by the Guangdong Provincial Institute of Tea Sciences, which is the breeder of Yinghong No. 9 tea varieties, the initiator of Yinghong No. 9 black tea products, the creator of Yinghong No. 9 brand, and the original creator of Yinghong No. 9 core technology, which has boosted the entire Guangdong black tea industry with one variety. The Guangdong Provincial Institute of Tea Science is also the only drafting unit of the local standards for Anglo-German black tea, and the standards are mainly drafted by industry experts from the Institute of Tea Sciences. The first domestic red stripe tea clean continuous processing production line is developed by the Guangdong Provincial Tea Institute, its many years of tea research base can provide high-quality fresh leaves, it can be said that "Hongyan" in terms of raw materials and processing technology, is the benchmark brand in British and German black tea.
 
Yinghong No. 9 bud leaves are rich in substances, taking one bud and two leaves steamed green as a sample, containing 30.91% tea polyphenols, catechins 152.13mg/g, amino acids 2.06%, the most aroma substances are linalool and its oxides, which is manifested as the aroma of lily or magnolia flowers, in terms of parameters, there is little difference between Yunnan large-leaf species, compared with the traditional Yunnan large-leaf species, Yinghong No. 9 has more significant results in yield, with a yield of about 200kg per mu, which is 30% higher than that of Yunnan large-leaf species. In addition to Yinghong No. 9, the Institute of Tea Science has also developed many excellent tree species such as Yinghong No. 1 and Hongyan No. 12.
 
There are not many types of Hongyan Yingde black tea products, except for a few relatively high-end products, its ordinary products have a distinct local product style, but it may be the most authentic Yinghong No. 9 brand you can drink. The price of 150g first-class Yinghong No. 9 cans is 133 yuan, and the price of Yingde black tea of the same specification is 59 yuan. Considering portability, you can buy its 150g sachets, each with a total of 30 sachets of 5g, which is convenient to carry at any time. Although Hongyan is not so particular about packaging, it is the most practical choice for buying self-drinking and family sharing.