In the global energy landscape transitioning to low carbon, smelters have become a new geopolitical stage. The past struggle for influence over oil and strategic straits has now shifted to control over the purification process of key minerals such as nickel, cobalt, and lithium, which are core raw materials for electric vehicles, solar panels, etc. Countries that control downstream processing can dictate prices, supply, set environmental standards, and hold strategic positions in international negotiations. China dominates the global mineral supply chain competition through an integration strategy, mining cobalt in the Congo, lithium in Chile, and building large processing centers, supported by government low-cost financing and technology subsidies. Currently, it controls over 70% of global battery-grade nickel supply, 80% of cobalt sulfate, and nearly all synthetic graphite, wielding immense influence in global mineral pricing and green mineral standard-setting. The United States, through the Inflation Reduction Act, drives supply chain restructuring, requiring EV components to be processed in specific regions or partner countries to qualify for subsidies; the EU, through the Critical Raw Materials Act, sets a target of 40% domestic processing by 2030 while limiting reliance on a single country to within 65%; Japan, South Korea, Australia, etc., are also actively building new partnerships with resource-producing countries in the Southern Hemisphere. Since Indonesia implemented a nickel ore export ban in 2020 (though challenged at the WTO), it has spawned over 50 purification facilities (such as RKEF and HPAL). Nickel processing exports surged from $2 billion to $34 billion within five years. Industrial zones like Morowali and Weda Bay have become symbols of downstream industry success, creating over 200,000 jobs and driving logistics, finance, and other supporting industries. However, the projects are dominated by Chinese investors, making Indonesia vulnerable to external dynamics; many smelters rely on coal-fired power, potentially facing carbon taxes or restricted access to the EU green market; most production remains at intermediate product stages like ferronickel, yet to upgrade to high-value-added products like cathodes or battery cells. To this end, Indonesia implements a progressive carbon tax based on emission intensity, promoting a transition to clean energy such as hydropower and solar; establishes the Indonesia Mineral Index as a transparent and fair domestic price reference to prevent transfer pricing; collaborates with multilateral development banks to channel energy transition funds into green purification technology R&D and industrial zone power transmission networks; establishes a Center of Excellence for hydrometallurgy to develop more efficient and environmentally friendly metal separation technologies, creating domestic reagent or catalyst formulations that are difficult to replicate, turning this knowledge into a strategic asset for future economic diplomacy; strengthens mineral diplomacy by launching the "Indian Ocean Critical Minerals Corridor" forum, uniting Tanzania, Mozambique, India, and Western Australia to harmonize logistics standards, sustainable certification, and cross-border supply chain financing; under the ASEAN and G20 frameworks, leads a coalition of mineral-producing countries to negotiate market access, clean technology, and green transition financing based on critical minerals. These policy initiatives have a solid constitutional foundation: the 1945 Constitution stipulates that land, water, and natural resources are owned by the state and used to the greatest benefit of the people; the Mining Law on Minerals and Coal emphasizes downstream obligations and raw mineral export bans; government regulations on mineral management and presidential decrees on strategic industry incentives further refine the transformation direction. Smelters are not just metal processing tools but also symbols of control over the world's energy future. With mineral reserves, strategic geographic location, and a track record of downstream industry development, Indonesia, if government, private sector, and research institutions act in concert, can transform from a mere supplier into a controller of the global green economy's future, achieving the goals of pricing, standard-setting, and rewriting the rules of the global green supply chain.