This photo taken on March 25, 2025 shows keychains made from recycled materials being displayed at a zero-carbon rest area for the Boao Forum for Asia (BFA) in Boao, south China's Hainan Province. China's Boao has announced the establishment of its first zero-carbon zone, a significant step forward in the country's pursuit of low-carbon development, according to authorities in Hainan. (Xinhua/Zhang Liyun)