Transmission towers dominate the skyline in Qingyang in Gansu province. [Photo provided to CHINA DAILY]

China's electricity market witnessed substantial growth in transaction volumes in May and the first five months of 2026, official data showed on Monday, highlighting the country's accelerating market-oriented power reforms and sustained economic vitality.

In May alone, the total volume of electricity traded in the national power market reached 626.8 billion kilowatt-hours (kWh), representing a significant year-on-year increase of 23.6 percent, according to the National Energy Administration.

A breakdown by trading scope reveals that intra-provincial transactions dominated the market, accounting for 490.6 billion kWh, a surge of 26.9 percent compared to the same period last year.

Meanwhile, inter-provincial and cross-regional transactions stood at 136.2 billion kWh, up 12.9 percent year-on-year, facilitating the optimized allocation of energy resources across regions.