Citybus, the public transport operator in Hong Kong, has announced a bold plan to replace 70% of its buses with hydrogen-powered models. The company has taken the first step by conducting road tests on a prototype hydrogen bus. This innovative bus, known as the DD12, is a 12-meter double-decker with three axles, making it the only one of its kind currently available. Citybus collaborated with China's Wisdom Motor to develop this unique bus, while the fuel cell technology was provided by Ballard-Weichai, capable of producing a maximum power output of 80 kW. The DD12 boasts a claimed range of 400 kilometers and has a capacity of 91 passengers, making it a promising solution for sustainable public transport. Additionally, the refueling process for this hydrogen-powered bus is efficient, taking only 10 minutes at Hong Kong's first hydrogen refueling station located at the Citybus depot in West Kowloon. This initiative underscores Citybus's dedication to sustainability and innovation in transitioning its fleet towards eco-friendly alternatives. By embracing hydrogen technology, Citybus is showcasing its commitment to reducing emissions and promoting clean energy usage in public transportation, setting a positive example for other cities and transport operators to follow suit.