The global pursuit of reducing carbon emissions has motivated the increased use of hydrogen as an energy source. While not a fuel itself, hydrogen is seen as a cleaner alternative, especially when produced from surplus electricity generated from renewable sources. In Hong Kong, efforts are underway to establish a hydrogen economy, with a focus on its application in transportation, particularly for buses and heavy goods vehicles. Safety concerns regarding hydrogen usage are being addressed through stringent regulations and safety codes to mitigate risks associated with leakages and refueling processes. The government's policy shift towards promoting electric and hydrogen vehicles over fossil fuel vehicles by 2035 reflects a commitment to sustainable transportation practices. By implementing comprehensive safety measures and regulations, Hong Kong aims to ensure a smooth transition towards a hydrogen-based economy, with the potential for rapid development in the near future.