![An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)](http://www.ecns.cn/hd/2018/08/22/a774f67242b84edeb307620be684832a.jpg)
An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)
![An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)](http://www.ecns.cn/hd/2018/08/22/ba1b9bc4237641789514facacab65b5b.jpg)
An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)
![A prosthetic foot developed by the Optiplane design bureau for an amputee kestrel named Grom, Aug. 21, 2018. (Photo/IC)](http://www.ecns.cn/hd/2018/08/22/5bb5d9240f08427ca2cf8ce3ca4ea827.jpg)
A prosthetic foot developed by the Optiplane design bureau for an amputee kestrel named Grom, Aug. 21, 2018. (Photo/IC)
![An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)](http://www.ecns.cn/hd/2018/08/22/c2fb43f1ddce402d8a0330f0fdcfebc3.jpg)
An amputee kestrel named Grom with a prosthetic foot developed by the Optiplane design bureau Aug. 21, 2018. (Photo/IC)