<h1>US-China leaders discussed isolating Iran, a 25% tariff on Iran-linked trade, Taiwan arms sales, and critical minerals supply chains.</h1> US-China discussions during a bilateral call focused on isolating Iran-combining diplomatic engagement, envoy talks, and an announced 25 percent tariff on imports from countries doing business with Iran-while addressing defense-related trade with Taiwan after a multibillion-dollar US arms package and considering inclusion of China in future nuclear-arms limitation talks as New START lapses. The leaders also discussed initiatives to diversify critical minerals supply chains away from China, indicating coordinated use of tariffs, arms transfer policy, export controls, and multilateral trade measures as state instruments.