Dr. Zhang Wei (L) introduces bats' body structure via 5G livestreaming in Shanghai Natrual History Museum, east China's Shanghai, April 18, 2020. Shanghai Natrual History Museum held a bat-themed 5G livestreaming show Saturday to help people learn more about bats. (Xinhua/Fang Zhe)

Dr. Zhang Wei (L) introduces bats' body structure via 5G livestreaming in Shanghai Natrual History Museum, east China's Shanghai, April 18, 2020. Shanghai Natrual History Museum held a bat-themed 5G livestreaming show Saturday to help people learn more about bats. (Xinhua/Fang Zhe)

Dr. Zhang Wei (L) introduces bats' body structure via 5G livestreaming in Shanghai Natrual History Museum, east China's Shanghai, April 18, 2020. Shanghai Natrual History Museum held a bat-themed 5G livestreaming show Saturday to help people learn more about bats. (Xinhua/Fang Zhe)

Dr. Zhang Wei (L) introduces bats' body structure via 5G livestreaming in Shanghai Natrual History Museum, east China's Shanghai, April 18, 2020. Shanghai Natrual History Museum held a bat-themed 5G livestreaming show Saturday to help people learn more about bats. (Xinhua/Fang Zhe)