In particular, the number of ships from Qing was limited to 30 and the trade amount to 6,000 kan of silver (kan is a unit of volume, approx.3.75 kg) per year, and ships from Holland was limited to 2 and the trade amount to 3,000 kan per year.
具体的には清国船は年間30艘、交易額は銀6000貫にまで制限し、また和蘭船は年間2隻、貿易額は3000貫に制限した。