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

3. Import and export policies and tariffs: In recent two years, with the progress of global economic integration, the state has gradually reduced export tariffs, and asphalt can basically be imported and exported freely, thus making domestic and international asphalt prices interact.

4. Relevant international market prices

5. Industry development trend and its changes

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