The performance of Yellow River Cyclone Company fluctuated greatly, and the performance in the past few years was unstable, and the profit level was high and low. This makes it difficult for investors to predict the future performance of the company and increases the investment risk. There is some uncertainty in the industry where the Yellow River cyclone is located, and the industry prospect is not clear enough. This makes it difficult for investors to evaluate the future development trend of the industry and increases the investment risk. So stocks can't be held for a long time.