China has made a big move to cut emissions by reusing an old oil pipeline to transport carbon dioxide. The 27km pipeline in Henan province delivered CO2 to an oilfield earlier this month. China Oil and Gas Pipeline Network Corporation (PipeChina) said the trial showed a "replicable and scalable" model for carbon capture, utilisation, and storage (CCUS). This success marks a major step for China’s green plans. The goal is to expand CCUS from small tests to huge projects. CCUS works by capturing CO2 from power plants and factories so it doesn’t escape into the air. The gas is then compressed, moved, and reused or stored underground. Injecting CO2 into oilfields not only traps the gas safely in rock formations but also helps get more oil out. This is called enhanced oil recovery (EOR), a win-win for reducing greenhouse gases and boosting oil production. China’s achievement could unlock large potential for cutting emissions while supporting energy needs.