By limiting the annual number of ships from Qing to 30 and the value of trade to 6,000 kan (a unit) of silver, while from the Netherlands the anual number of ships, 2 and the value of trade to 3,000, these regulations encouraged domestic production of hitherto imported goods, such as cotton cloth, raw silk, sugar, buckskin, silk fabric and so on.
清国船は年間30艘、交易額は銀6000貫にまで、オランダ船は年間2隻、貿易額は3000貫に制限され、従来は輸入品であった綿布、生糸、砂糖、鹿皮、絹織物などの国産化を奨励した。