2. Changes in interest rates (if interest rates increase, capital investment will decrease, resulting in smaller initial mining scale; High interest rates will also increase the capital cost of alternative technologies, leading to a decline in mining speed);

3. Exchange rate changes (the fluctuation of asphalt price is negatively related to the exchange rate changes between the US dollar and major international currencies, and the rise of the US dollar puts pressure on asphalt settled in US dollars. When geopolitics is in turmoil, asphalt is positively related to the US dollar, and the two complement each other);

4. Changes in oil inventory (inventory is a buffer between supply and demand. When the futures price is higher than the spot price, the commercial inventory will increase, thus stimulating the spot price to rise. On the contrary, it will cause the spot price to fall); Ask the old teacher if you don't understand. It would be better to teach 485 1-=34929.