Nowadays, there are people in the market who ask for the factory price of diammonium phosphite. He inquired about all the merchants in the market, wanting to get high-quality and cheap goods.

The merchants all set their prices, ranging from high to low. The seeker observes it carefully, considering the high price, the profit is thin, and the price is low and the quality is not good. It is to visit many places and inquire about the same industry, hoping to get a good price.

Or a merchant says: "The diammonium phosphite produced by my factory is of high quality and the price is average, you can observe it in detail." The seeker visited the factory, observed the method of its production, and inspected the quality of its goods. Feeling that what he said is true, he negotiated with the merchant.

The merchant said: "My factory price depends on the quantity. If the quantity is large, the price will be better." The seeker thinks about it, measures the quantity he needs, and after a long time of grinding with the merchant, he finally gets a satisfactory factory price. So he happily made a contract with the merchant, and the transaction will be smooth in the future, and each will get his own benefit.