For example, in anticipation of the huge demand in China market, they made a lot of purchases on commodity futures before China purchased raw materials, thus boosting commodity futures prices. The commodity futures market is a market that overreacts to various price factors. China's massive purchase is a bullish message. With the cooperation of China's factors, the fund is doing more, resulting in the imbalance between supply and demand in the futures market and the rapid rise of commodity futures prices. As a result, the fund closed its position at a high level and obtained excess profits, while domestic enterprises had to take orders at a high level and pay high costs.