The futures main company is the continuation of the main contracts in different stages, and the links of each main contract are unique; The term refers to the weight of all contracts, including all contracts, including not only the main contracts, but also the non-main contracts.

Therefore, if your futures operation cycle is short and short-term, then it will be better for you to refer to the main contract, that is, to see the main company; And the longer the operation period, the better the reference index will be. The specific situation should be analyzed in detail.