This is very simple: 070 1, 080 1, 090 1 (all contracts are 1 month) of corn are continuously displayed on the K-line diagrams of most market software, so June 65438+ 10/kloc-0.

Other trading varieties have similar changes, except that some market softwares display odd months and even months separately and continuously (for example, Shihua's market system, 070 1 and 090 1 together, 060 1 and 080 1 together), and most of them display contracts of the same month continuously.