Da Yi (大益)
Originaly Da Yi was name of Pu-erh tea’s brand from old Menghai tea factory. Menghai tea factory was one of big manufacturers of tea in Yunnan during 1938-1950. Menghai tea factory is known for its production of ripe ( Shu ) Pu-erh tea. Later on Da Yi became an official brand of Menghai tea factory. Da Yi Tea Group Company was established in 2004, since then Menghai tea factory has been one of the members.
Mengku Rong Shi (勐库戎氏)
Mengku Rong Shi tea factory is based in Shuangjiang ,south-west of Yunnan province. It is a family-run business for the last three generations which is more than a hundred years. Nowadays Rong Shi still follows the traditional way of of tea production and besides organic black tea is mainly focused on Sheng Pu-erh tea.