At least a dozen buzzing drones monitor them around the clock. Wherever they go, they're escorted by police. And when they eat or sleep, they're watched by millions online.
원문출처 : https://www.cnn.com/2021/06/09/china/elephants-china-yunnan-intl-hnk/index.html
원문출처 : https://www.cnn.com/2021/06/09/china/elephants-china-yunnan-intl-hnk/index.html