<h1>Tariff measures and export limits as leverage influence trade negotiations and supply chain security between major economies.</h1> Tariff measures and export restrictions are central to renewed US-China negotiations, with both sides signalling a preliminary consensus to stabilise trade relations. The account frames tariffs and export controls as regulatory instruments to be calibrated or withdrawn in exchange for negotiated commitments affecting supply chains for critical minerals and technology inputs, and notes their use to influence broader political and diplomatic objectives.