The cheapest corn, wheat and so on, but the transaction volume is small, and the price fluctuation is within 2000 yuan.

Relatively active zinc, PTA and silver, the price is slightly higher,

Glass costs more than 3000 yuan, and the price fluctuates greatly. Some of them succeeded.

The charge for each variety is different, which is too complicated. It is charged according to the proportion of the number of transactions and the transaction amount.

You can continue to ask about adoption for details.