Group 1 - The World Biosphere Reserve Conference was held on September 22, focusing on the theme of balancing biosphere protection with sustainable human development [1] - The conference featured key speeches from prominent figures, including the President of the International Water Resources Association and the Director of the UNESCO East Asia Regional Office, discussing systematic ecological protection and the contributions of the "Man and the Biosphere Programme" [1] - The event aimed to promote global harmony between humans and water, sharing China's water management experiences and wisdom to contribute to the United Nations' sustainable development goals [1] Group 2 - Experts from various organizations, including UNESCO and the Chinese Academy of Sciences, engaged in discussions about innovative approaches to river and lake ecological protection and governance [2] - The conference highlighted China's achievements and experiences in river and lake ecological protection and restoration, showcasing the country's efforts in sustainable development [2] - The World Biosphere Reserve Conference is organized by UNESCO and takes place approximately every ten years [2]