To be exact, the "Zhengzhou price" was circulated in the wheat market before. At that time, Zhengzhou Commodity Exchange introduced wheat futures varieties for the first time in China, and Zhengzhou price appeared for the first time in the international wheat market. Coupled with the location of the main wheat producing area in Henan, the price index system has gradually formed in the domestic market.

From 1997 to 1999, the futures trading volume of Zhengshang Institute ranked first in China for three consecutive years, accounting for about 50% of the market share, and the impact on the market could be imagined at that time.

However, since the stock market bought wheat, the market price has gradually become the dominant market, and the pattern of national unification of wheat market price has become stronger and stronger.

The price of corn depends on Shandong, and the original words are different. We say that corn generally "looks up at Shandong and looks down at Guangdong".

Compared with the wheat market, corn has a higher degree of marketization. Since the beginning of the new century, with the development of corn deep processing, the pattern of corn supply and demand has gradually tightened, especially in Shandong. At the same time, Shandong is still the traditional corn producing area in China. This contradiction between production and marketing has become more obvious in Shandong during this period: once the price of the place of origin rises, it means that the supply is insufficient and the sales area will naturally rise.

Over time, the industry has formed a phenomenon of "looking up to Shandong".