《明史·志·卷五十六》
当时都御史王绅、御史黄国用提议：雨淮灶户的余盐，每引官府给予银二钱，以充熬盐工本，增收三十五万引，称为工本盐。
时都御史王绅、御史黄国用议：两淮灶户馀盐，每引官给银二钱，以充工本，增收三十五万引，名为工本盐。
At that time, Inspector Wang Shen and Inspector Huang Guoyong proposed: For the surplus salt of the Yuhuali stove households, the government should give two cents of silver per permit to pay for the salt making costs, and increase the collection of 350,000 permits, which is called cost salt.