This dataset represents electricity supply from the power grid in the Northwest China region at voltages greater than 1~35 kV, i.e., the medium voltage range, covering Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang, and Xizang. Since the infrastructure, emissions, and transmission line losses associated with delivering electricity to end users are already accounted for in the market dataset, the market group dataset is simply a weighted aggregation of the individual market datasets within this region. The data primarily originates from official statistics.