Core Insights - The article highlights the successful development of China's first 100-kilowatt oil and gas associated wastewater hydrogen production system by China National Petroleum Corporation (CNPC) in collaboration with Changqing Oilfield [1] Group 1: Technological Breakthrough - The 100-kilowatt oil and gas associated wastewater electrolysis hydrogen production system has achieved continuous and stable operation at the Sulige gas field [1] - This development signifies a substantial breakthrough in the resource utilization of oil and gas wastewater in China, particularly in the "pollution reduction - hydrogen production" full-chain approach [1]