How to cultivate Codonopsis pilosula for high yield

Codonopsis pilosula (scientific name; Codonopsis pilosula) is oval or quasi-round thick piece, the surface is yellowish brown or grayish yellow, the section is yellowish white or yellowish brown, with fissures or chrysanthemum patterns, and a yellowish center in the center. The periphery is yellowish white and yellowish brown with longitudinal wrinkles. Have special features