Photo taken on April 12, 2021 shows the Wormhole Library in the Haikou Bay in Haikou, South China's Hainan province. [Photo/Xinhua]
Photo taken on April 15, 2022 shows the Wormhole Library in the Haikou Bay in Haikou, South China's Hainan province. [Photo/Xinhua]
Aerial photo taken on April 15, 2022 shows the Wormhole Library in the Haikou Bay in Haikou, South China's Hainan province. [Photo/Xinhua]
Photo taken on April 16, 2022 shows the Wormhole Library in the Haikou Bay in Haikou, South China's Hainan province. [Photo/Xinhua]
People read at the Wormhole Library in the Haikou Bay in Haikou, South China's Hainan province, April 16, 2022. [Photo/Xinhua]
