The high seas cover more than half of the planet, but protecting them requires countries to turn commitments into action. The BBNJ Agreement offers a new framework for international cooperation, including the creation of marine protected areas. With three cities bidding to host its secretariat, CGTN's Dong Xue spoke with Olivier Poivre d'Arvor, France's ambassador to the Poles,  about the selection, China's role in ocean governance and how China and France can work together – even when they disagree.