Due to armed conflicts in major copper mining regions of the Democratic Republic of Congo, international copper prices surged above $11,000 per ton within a week. To ensure supply chain security, several Chinese companies including Far East Cable and Hengtong Optic-Electric announced increased investments in domestic lithium battery copper foil production capacity. By the end of 2026, the self-sufficiency rate of copper foil for power batteries in China is expected to reach 85%. Some high-voltage cable manufacturers have begun trials of "copper foil + aluminum conductor" composite structures to reduce reliance on pure copper.