After eliminating some inferior types, Yeh was left with 1,000 species, of which about 400 were suitable for mass production.
二十五年下來，葉福棋收集的仙人掌品種高達一千七百種，經過觀察、改良，淘汰至今近一千種，但由於不少稀有品種，繁殖力低，生長速度緩慢，適合大量生產的只有四百種左右。