Generally, large brokers will negotiate the commission in advance, and there are strict procedures for adjustment, which need my signature to confirm. Don't worry about the commission. Dentists, brokers and other intermediaries negotiate to introduce the business.

In the case that commodity transactions must go through dentists, commission is a compulsory intermediate exploitation.

Most of the commission is paid by the seller, and some of it is paid by the buyer and the seller respectively.

The amount of commission depends on the nature and value of the goods, and in some places it is determined by convention.