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The Lianghekou dam in western Sichuan, China, is progressing towards becoming the world's largest hybrid pumped storage project. It combines conventional hydropower with pumped storage. Recent milestones include the completion of an underground power station excavation on February 22 and the initial concrete pour for the lower reservoir at Yagen I.

The pumped storage will have four reversible turbine units of 300 megawatts each, adding to the dam's existing 3,000 megawatt hydropower capacity for a total of 4,200 megawatts. The facility will utilize surplus energy from 7 gigawatts of renewable capacity, producing an estimated 1.4 terawatt-hours of electricity annually.