Photo taken on Dec 17, 2017 shows a fire robots delivery ceremony at Meishan Free Trade Port Area in Ningbo, East China’s Zhejiang province. A total of 60 anti-explosion fire robots were delivered here on Dec 17. [Photo/Xinhua]

Firefighters take over fire robots during a delivery ceremony at Meishan Free Trade Port Area in Ningbo, East China’s Zhejiang province, Dec 17, 2017. A total of 60 anti-explosion fire robots were delivered here on Dec 17. [Photo/Xinhua]

Fire robots demonstrate during a drill at a delivery ceremony in Meishan Free Trade Port Area of Ningbo, East China’s Zhejiang province. A total of 60 anti-explosion fire robots were delivered here on Dec 17. [Photo/Xinhua]