In September 2025, the 5^th World Congress of Biosphere Reserves is held in Hangzhou, China. On the eve of this event, CGTN Spanish's Sounds of Nature program meticulously planned and released the short documentary Sounds of Nature: A 24-Hour Symphony of Mountains and Seas. Filmed on location in Tianmu Mountain (Hangzhou, China) and the Galapagos Islands (Ecuador), the program highlights the outstanding achievements of China and Latin American countries in biosphere conservation and addresses key global conservation issues.