2. As mentioned above, because of the substitution relationship, there is a trend of ups and downs, and oil prices rise, so the cost of using crude oil is high, so others will choose coal as energy, which is good for coal.

3. In the absence of recovery in the international economy, it is expected that the oil price will hover around $40 for a long time.

At least in the next 50 years, coal energy will be the main energy in the world. In the long run, coal is non-renewable, so it is inevitable to be replaced. But in these 50 years or so of investment opportunities, as long as we grasp them well, there are still great opportunities. Especially in China, coal is the most important pillar of China's economic development, and its energy consumption even exceeds that of oil.