Chimpanzees are one of the most intelligent animals in the world, and 18-year-old Yuhui, a male chimpanzee who lives in southwest China's Chongqing Municipality, is no less. 

The smart chimp was caught on camera spending more than 30 minutes washing his keeper's T-shirt with soap and brush. 

The video shows Yuhui dipping the T-shirt in water before repeatedly rubbing the soap. According to a spokesperson for Chongqing Lehe Ledu Theme Park, the keeper wanted to find out if the chimp had learned how to do the laundry by observation and deliberately left his t-shirt along with washing material in his enclosure.  

(Editor: Li Yunqi; cover image via VCG)

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