Nilka County, Xinjiang Uygur Autonomous Region, northwest China - Dec 27, 2019 (CCTV - No access Chinese mainland)
1. Aerial shot of Tianyun Salmon Breeding Base
2. Underwater cleaner robot
3. SOUNDBITE (Chinese) Li Chunyu, technical director, Tianyun Salmon Breeding Base:
"This is an optical camera used in clear water, and that is a sonar image equipment used to observe landforms if the water is muddy. To capture the dirt, it will go with wheels spinning and suck up through this pipe."
4. Various of cleaner robot being lowered into water
5. Computer screen showing real-time images of cleaner robot
6. Various of sewerage running into pond through pipe
7. SOUNDBITE (Chinese) Li Chunyu, technical director, Tianyun Salmon Breeding Base:
"The collected excrement will be desiccated before being made into organic fertilizer."
8. Various of workers operating equipment
9. Various of salmon in net
10. SOUNDBITE (Chinese) Hu Honglang, deputy head, National Fisheries Technology Extension Center, Ministry of Agriculture and Rural Affairs:
"It is actually needed in a great number of small lakes or areas with low-water level. Based on this equipment, we can use it to adopt a wider range of environmentally friendly uses in this industry."
11. Various of cleaner robot being hoisted from water

Northwest China's Xinjiang Uygur Autonomous Region officially put the country's first fishery underwater cleaner robot into operation on Friday, as part of the effort to improve water quality and protect the ecological system in the aquaculture industry.

Weighing over 400 kilograms, the tank-like cleaner robot was lowered into the water in Tianyun Salmon Breeding Base in Nilka County to clean the silt and rubbish at the bottom of reservoir.

"This is an optical camera used in clear water, and that is a sonar image equipment used to observe landforms if the water is muddy. To capture the dirt, it will go with wheels spinning and suck up through this pipe," said Li Chunyu, technical director of Tianyun Salmon Breeding Base.

When the robot reaches the designated depth, its pump started working within five minutes, drawing out fish excrement, residual bait and silt to a pond for filtration.

"The collected excrement will be desiccated before being made into organic fertilizer," said Li

This robot is able to operate at a depth of 100 meters underwater, covering 30 to 40 cubic meters per hour, and is expected to undertake cleaning jobs in different water conditions.

"It is actually needed in a great number of small lakes or areas with low-water level. Based on this equipment, we can use it to adopt a wider range of environmentally friendly uses in this industry," said Hu Honglang, deputy head of National Fisheries Technology Extension Center, Ministry of Agriculture and Rural Affairs.