Of course. Investors can trade through financial products such as coal futures, so as to participate in the trading in the coal market. When coal prices fall, investors can choose to buy at a low price and sell at a profit when prices rise. So coal can be bought and sold when it falls. This kind of operation requires certain market analysis and risk control ability, and investors need to have a certain understanding and judgment of the market to avoid blindly following the trend and over-investing.