Professor Pei lists various ideas: Nature spreads seeds on its own, and then some seedlings don't survive; perhaps excess seedlings could be transplanted and sold to flower markets in the lowlands.
裴老師滔滔描繪即將進行的各項工作：森林裡天然下種、過多而被自然淘汰的種苗是否可以適時移至平地花市出售，也在請植物學者評估。