Hong Kong has the potential to become an international innovation hub for hydrogen technologies, says Towngas’s Don Cheng. : Cheng, who is head of commercial of Hong Kong utility and head of sustainable green energy hub at Towngas was addressing an audience of more than 200 investors, research teams and energy professionals during a ceremony for the third Tera-Award Smart Energy Innovation Competition at Hong Kong Science Park. The event was jointly organised by Towngas and the mainland Chinese state-owned State Power Investment Corporation.