Sanwanchang was founded in Qing Xianfeng five years, has a history of more than 100 years, in 1999 by the Ministry of Domestic Trade of the People's Republic of China certified as "China time-honored brand". Sanwanchang has successively opened up more than 2,500 acres of green pollution-free base tea gardens in the east and west mountains of Dongting Lake, Taihu Lake, and is the first local enterprise to establish a tea garden base in Dongting Mountain. With 5,000 square meters of production and processing base, logistics center, Biluo spring sales reached 15 tons, in order to ensure the quality of green tea, Sanwanchang also invested in the construction of 3 tea low-temperature, thermal insulation warehouse, for the preservation of tea, the production of Biluo spring tea as early as 2002 won the gold medal of the China Famous Tea Expo. Zhang Yiyuan's current sales of Biluochun are all produced by Sanwanchang.
 
Double drying is also important in the production process of Sanwanchang, the low water content means that the weight of the tea is reduced, but the shelf life of the tea is also extended, and the taste can be maintained for a longer time. Sanwanchang did not set up the best products, refined and other high-end series, but in accordance with the standard of Dongting Biluchun, the highest grade is the first level of the Ming Dynasty, 50g small iron box price is 280 yuan and 380 yuan two grades, the use of earthen pot stove handmade tea, all tea is bulk now called now sold. Ming Qiante secondary price has 139 yuan and 188 yuan two grades, in Biluochun cost-effective good, its first-class Biluochun and fried green price is not much different, 50g iron box price 60 yuan, different from Biluochun, its fried green in red canned packaging for sale, ration tea choice. Of course, as a time-honored brand, there are naturally a large number of gift tea series, generally packaged in porcelain jars, and not blindly pursuing expensive, you can choose the right gift at all prices.