I know of no other Korean producer than Ms Oh Yeong Soon who also specializes in producing Puer. Ms Oh travels to Yiwu Mountain one of the 6 great Puer Tea Mountains in Yunnan, China. There she goes on a difficult trek to her favorite farmer where she selects the precise older trees and just quality. Then she both participates and supervises the production of her own Sheng Puer 生茶 by hand, "the old way". These are exceptional leaves, improved with 15 or 16 years of being stored in Korea properly.