The Lower Sesan 2 Hydropower Plant is a China-Cambodia co-developed Belt and Road landmark, spanning 6.5 kilometers across the Sesan River. It has redefined cross-border infrastructure since 2013 and meets 20 percent of Cambodia's electricity needs. Generating 2 billion kilowatt hours of clean energy annually (offsetting 600,000 tonnes of CO2 emissions), this engineering marvel extends its legacy further, by empowering local engineers like Thet Kosal to lead hydropower innovation through cross-border knowledge exchange.