A man views an aquaponics system at a park on Dongyu Island in Boao, south China's Hainan Province, March 28, 2023. The Boao Forum for Asia (BFA) holds its annual conference from March 28 to 31 in Boao, a coastal town in China's southernmost province of Hainan. Green development and new energy drew much attention during the conference. (Xinhua/Zhang Liyun)