Firefighters from Yunnan Provincial Forest Fire Brigade prepare to fly a drone to track the wandering wild Asian elephants in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 16, 2021. (Photos: China Daily)

A firefighter from Yunnan Provincial Forest Fire Brigade operates a drone to track the wandering wild Asian elephants in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 16, 2021.

A firefighter from Yunnan Provincial Forest Fire Brigade operates a drone to track the wandering wild Asian elephants in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 16, 2021.

A firefighter from Yunnan Provincial Forest Fire Brigade takes photo of the wandering wild Asian elephants on the screen in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 16, 2021.

Members of Yunnan Provincial Forest Fire Brigade watch the monitoring footage of the wandering wild Asian elephants in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 15, 2021.

A firefighter from Yunnan Provincial Forest Fire Brigade charges a drone at a local resident's home in Shijie Yi autonomous town of Yimen county, Yuxi city, Southwest China's Yunnan province, on June 15, 2021. The herd has been lingering in Yimen county for more than a week and local residents have been offering their full support for the monitoring work.