There is relative independence, but there is no absolute independence. For example, the rebar round steel market and the cotton soybean meal market seem to be independent of each other, each with its own price cycle and trajectory. In fact, it has the dual effects of international and domestic economic cycles and market fluctuations. The cross-market flow of funds will make the above two markets, price and transaction scale, tend to be linked in the same proportion; Or often the other way around,