《明史·列传·卷二百零一》
皇帝说 ：当地没有这种物产，却偏要从这个地方求取，这正会疏远百姓的，何况他们又是远方的夷族人，尤其应当宽待体恤他们，将他们的海贝巴税免了吧。 
帝曰： 取有于无，适以厉民，况彼远夷，尤当宽恤，其除之。 
The emperor said: If a place does not produce something, you cannot insist on extracting it from that place. That will only estrange the people. Moreover, these are distant ethnic minorities, and they should be treated with greater kindness and consideration. Grant a tax exemption on their sea shells.