This dataset represents medium-voltage (>1, <=35 kV) grid electricity supply of Central Grid in China, including Jiangxi, Henan, Hubei, Hunan, Chongqing, and Sichuan. As the infrastructure, emissions, and transmission and distribution losses associated with electricity delivery to end users are already accounted for in the underlying market datasets, this market group dataset represents a weighted aggregation of individual market datasets within the region. The data are primarily derived from official statistics.