2. International and domestic economic situation: Copper is an important industrial raw material and its demand is closely related to the economic situation.

3. Import and export policies and tariffs: For a long time, as China is a big country with insufficient copper resources, it has always adopted the policy of "lenient import and strict export". The average import tax rate of copper and copper products is 2%. In recent two years, with the progress of global economic integration, the country has gradually reduced export tariffs, and copper can basically be imported and exported freely, thus making domestic and foreign copper prices interact.

4. The price of relevant international markets: for example, the price impact of LME and COMEX.

5. Industry development trend and its changes