I've seen their nursery stock (made a video if you want to see their nursery back in 2013), and they only use quality flowers for propagating. Even in the wild nearby the nursery C. tibeticum with a white base color are quite beautiful, and the shades from darker to lighter are not that pronounced. Flower shape, and to some degree size, are variable however. I much prefer these clear pink/purple tones over the wine/maroon shades of yellow base colored flowers. So if you buy from Wenqing you are not only guaranteed of buying a laboratory produced plant, but one with pleasing color and shape as well.