Second, each product has its own code, such as copper is cu, zinc is zn, and soybean meal is M. Generally, in the big market of futures market, the name is written directly, such as Hutong 0908 and so on. This code is only used when conducting transactions.

The three examples you cited, in which M is the code of soybean meal and 0905 represents the delivery month, constitute the name of the contract, among which m0909 is the main contract at present, with the largest transaction volume.