![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/d3ba4eea3adb4c289ccac82861055cc1.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)
![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/e6a1aa87b5be4f6385b94df8209e6eca.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)
![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/f7359278c45d47d7876493de23f07569.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)
![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/5c639f230bb84511b433350e074af613.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)
![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/8ce6c8b85f42424fbe2fdbd8482d0383.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)
![The photo taken on May 29, 2019 shows a sponge and coral garden shot by China\'s remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)](http://www.ecns.cn/hd/2019/05/29/eedf8eb4c85848f4a73fefc742abc9a3.jpg)
The photo taken on May 29, 2019 shows a sponge and coral garden shot by China's remote operated vehicle (ROV), Discovery, in the sea bottom of western Pacific Ocean. (Photo/Xinhua)