First, take the initiative. In order to prevent the price increase of raw materials, hoarding is an appreciation of long-term production and marketing plans, such as crude oil, non-ferrous metals, steel and grain.

But we should pay attention to the timing and the nature of the materials. It's like the futures market. We should have foresight and accurate judgment.

Second: passive. This may be caused by various reasons. If the product is unsalable, it will be fatal to the company. For example, in the electronics industry, products will become rubbish if they are updated too quickly.