Chimpanzees are known for their intelligence.
And one such primate has stunned his keeper after being spotted washing clothes in his enclosure.
Yuhui, an 18-year-old male chimpanzee living in China, spent half an hour cleaning a white T-shirt with a brush and a bar of soap, his keeper said.
The animal was caught doing the chore last Friday at the Lehe Ledu Theme Park in Chongqing, south-western China.
A spokesperson from the park told MailOnline that Yuhui loved watching his carer washing clothes.
The primate has a curious nature and is very good at mimicking actions, according to the spokesperson.
Yuhui's keeper wanted to find out if the chimp had learned how to do the laundry by observation, therefore she placed a T-shirt, a brush and a bar of soap next to a small pool of water in a piece of dented rock.
As soon as Yuhui and his 17-year-old sister were let out of the building, Yuhui headed straight to the T-shirt.
A video provided by the park shows Yuhui looking back to check on his sibling before picking up the brush and the soap.
After getting enough foam on the clothing as well as his hands, Yuhui put the T-shirt back to water to rinse before wringing it and laying it on the edge of the boulder.
He seemed to enjoy the process - so much so that he then washed the T-shirt again.
Yuhui's laundry session lasted for 30 minutes while his keeper was preparing food for him and his sister, the zoo said.
Earlier this year, another 18-year-old chimpanzee in China, Mei Su, shot to fame after being filmed regularly sweeping her enclosure with a broom.
The female primate had copied the actions from her keepers.
According to staff at the Shenyang Forest Zoo, Mei Su's intelligence equals to that of a three-year-old child.
They said they had not realised how clever the animal was until they saw her opening a bottle of water by twisting the plastic lid - instead of biting it off.
Chimpanzees share 99 per cent of DNA with human beings and are our closest living relatives on earth.
They are one of the most intelligent animal species in the world and can do nearly everything that was once considered a trait exclusive to mankind, primatologist Frans de Waal told Business Insider.
A study from last year reveals that chimpanzees keep their beds cleaner than humans.
The findings, discovered by researchers in the US, suggest that the great apes build complex tree nests out of branches and leaves in which they sleep, and these forest nests contain fewer body bacteria - such as those shed from the skin - than beds in most human households.
© Associated Newspapers Ltd.