Visitors walk at the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday. (Xinhua/Wang Dongzhen)

Visitors queue to enter the Saudi Arabia's pavilion at the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday. (Xinhua/Wang Dongzhen)

A visitor scans a shared scooter at the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday. (Xinhua/Wang Dongzhen)

Visitors pose for photos at the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday. (Xinhua/Wang Dongzhen)

People visit the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday. (Xinhua/Wang Dongzhen)

Visitors pose for photos in front of the China's pavilion at the Green Zone of the 28th session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP28), in Dubai, the United Arab Emirates, Dec. 3, 2023. Green Zone of COP28 opens to the public at the Expo City of Dubai on Sunday.