The 5th World Congress of Biosphere Reserves kicked off in Hangzhou on September 22, and will continue until September 26. As the host city of the event, Hangzhou provides the high-level, warm and theme-related international event experience for about 4,000 attendees from more than 150 countries and regions, through systematic green actions and people-oriented services. During the event, the unique Hangzhou elements make a stunning appearance, winning widespread praise from attendees.