Beneath the contested and resource-rich waters of the Bohai Sea, China has crossed a threshold long sought by its energy planners: a massive offshore gas field, decades in the geological making, has entered full production at a moment when the nation's eastern heartland hungers most for power. The Bozhong 19-6 field — the largest of its kind in China's eastern waters — represents not merely an engineering achievement wrested from depths exceeding five thousand meters, but a deliberate rebalancing of where energy flows within a vast and unevenly supplied nation. In bringing this field online du