The cost of soda ash 2 109 is as high as 3.5+ 10 = 13.5, and the cost of non-main soda ash 2 105 is as high as 6+6 = 12.

Zhengzhou Commodity Exchange (hereinafter referred to as Zhengshang Institute) was established in June 1990 and June 12. It is the first domestic futures market pilot unit approved by the State Council. After two years of successful spot trading, futures trading was officially launched on May 28th. 1993. It is one of the five major futures exchanges in China, and it is under the vertical management of China Securities Regulatory Commission.

Zhengshang Institute is a legal person that provides places, facilities and related services for centralized bidding trading of futures contracts, performs the functions stipulated in the Provisional Regulations on the Administration of Futures Trading and the Measures for the Administration of Futures Exchanges, and is not for profit, and implements self-discipline management in accordance with the articles of association of Zhengzhou Commodity Exchange.