The world's sequoia according to the growth of geographical and biological characteristics can be divided into 11 species, in addition to Australia's AUSTROTAXUS SPICATA produced in the southern hemisphere, the rest of the distribution of the northern hemisphere in the temperate to subtropical regions. China has five species; ① southern red bean counters, mainly distributed in western Yunnan and other 16 counties; ② Northeast red bean counters, mainly distributed in the Jilin Changbai Mountains and the Heilongjiang area, the eastern mountains of Liaoning are also distributed; ③ Tibetan red bean counters, mainly distributed in the northwestern part of the south of the stone, southern and southwestern Tibet; ④ China Red Bean Cedar (varieties), mainly located in Jiangsu, Zhejiang and so on; ⑤ Yunnan Red Bean Cedar. Its characteristics are: wide geographical distribution, growth dispersed, no pure forests, mostly forest trees, the number of very few, their own breeding capacity is low.

Taxus media is a natural hybrid discovered in the United States in 1918, its mother is the northeastern sequoia (T.cuspidata), the father is the European sequoia (T.baccataL). It has a history of more than 80 years in the United States and Canada. Later on, more than 10 Manzanita strains have been bred by artificial hybridization, and the Hixa strain is one of the best strains. As a new species, the content of paclitaxel is several to ten times higher than that of other redwoods. It is a shrubby, evergreen tree, with an inconspicuous main root, developed lateral roots, lush foliage, strong sprouting power, resistance to pruning, cold resistance, and can withstand temperatures as low as -30 degrees Celsius.