Hong Kong Tramways has raced into the record books, becoming mainland China's first recipient of the prestigious Engineering Heritage Award from IMechE – a global nod to its enduring innovation that keeps the city moving.     The secret behind these iconic "Ding Dings"? A brilliant aluminum alloy body that outlasts traditional teak, paired with an AC power system that actually returns unused electricity to the grid. Smarter, greener, and tougher – just like Hong Kong itself.     For 120 years, these 100% locally built double-deckers have been the heartbeat of Hong Kong Island. Today, 165 trams still weave through the urban jungle, carrying 150,000 daily riders with timeless efficiency.     Since 1984, IMechE has honored just 130 elite engineering marvels worldwide. This award isn't just about tracks and wires – it's a celebration of how Hong Kong moves forward while staying true to its roots.