In Hong Kong, Citybus made a significant move by launching a hydrogen-powered double-decker bus on a cross harbour route that passed through several toll tunnels, including Aberdeen, Cross Harbour, and Lion Rock. The managing director, Richard Hall, expressed the company's commitment to phasing out diesel buses in the upcoming years and transitioning to a completely zero-emission fleet by 2045. He outlined plans to procure more electric buses alongside at least five hydrogen buses to gather valuable data for future operational decisions. Hall emphasized the importance of fare increases to sustain the company's operations and invest in new technologies. Despite initial safety concerns about the flammability of hydrogen, early passengers were impressed by the quieter and eco-friendly nature of the hydrogen bus. Citybus aims for a fleet composition of 70% hydrogen buses and 30% electric buses, positioning Hong Kong at the forefront of international energy solutions and technological advancements in the public transportation sector.