Umberto Bombana is recognised as one of the world's most renowned chefs, and the first to be awarded three Michelin stars for an Italian restaurant outside of Italy. He lives in Hong Kong and now he's turning his skills to Chinese dim sum, a simple but complex delicacy to make.

Chef Bombana has spent his career inside the world's most famous restaurants. But his life began in the Italian alps where he grew up surrounded by the magical countryside. Our James Chau has been asking Chef Bombana about his indelible link to nature, and for his thought leadership on the future of sustainability.

China's railway system has received significant attention in recent years for its growing high-speed network. However, the country's older and slower “green trains” remain a crucial transportation option for millions of people annually.