During the period of 1993 ~ 1998, rice futures were listed and traded in Dashang, and together with corn varieties, they were once the main varieties of Dashang. From 65438 to 0998, the state rectified and standardized the futures market and cancelled corn, rice and other varieties. Since then, major trading companies have been striving for the listing and trading of corn and rice futures. After corn futures resumed trading in Dalian Commodity Exchange in 2004, Dashang promoted rice futures as the key work of variety innovation of grain futures.